A Study to Evaluate the Safety, Tolerability, and Immunogenicity of a Modified RNA Vaccine Against Influenza
A PHASE 1/2 RANDOMIZED STUDY TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A MODIFIED RNA VACCINE AGAINST INFLUENZA IN HEALTHY INDIVIDUALS
1 other identifier
interventional
1,158
1 country
100
Brief Summary
This study will be divided into two substudies - Substudy A (SSA) and Substudy B (SSB) Substudy A This is a Phase 1 randomized substudy to evaluate the safety and immunogenicity of monovalent influenza modRNA vaccine (mIRV) and bivalent influenza modRNA vaccine (bIRV) at various dose levels, and quadrivalent influenza modRNA vaccine (qIRV), in participants 65 to 85 years of age. Participants will receive at Vaccination 1 either:
- 1 of 4 dose levels of mIRV (either A or B Strain),
- 1 of 4 dose levels of bIRV (containing both A and B strains),
- qIRV (at 1 dose level), or
- A licensed quadrivalent influenza vaccine (QIV). At approximately 8 weeks following Vaccination 1, participants will be unblinded and QIV (Vaccination 2) administered to participants not having previously received this at Vaccination 1. Additionally, participants who previously received QIV at Vaccination 1 will receive one of the following for Vaccination 2:
- mIRV encoding A strain at dose level 4, or
- mIRV encoding B strain at dose level 4. Substudy B This is a randomized substudy to evaluate the safety and immunogenicity of the following vaccination schedules in participants 65 to 85 years of age: 2-Visit Schedules
- 2 doses of qIRV (at a dose level 1), administered 21 days apart.
- 2 doses of licensed QIV, administered 21 days apart (as a control group)
- A dose of licensed QIV following by a dose of bIRV encoding 2 A strains at dose level combination 1 or 2, administered 21 days apart. 1-Visit Schedules
- A dose of licensed QIV administered concurrently in the opposite arm with bIRV encoding 2 A strains at dose level combination 1 or 2.
- A dose of bIRV encoding 2 A strains administered concurrently in the opposite arm with a dose of bIRV encoding 2 B strains.at dose level 1.
- A dose of qIRV encoding 2 A strains and 2 B strains at dose level 2 (at one of two possible dose level combinations).
- A dose of qIRV encoding 2 A strains and 2 B strains at dose level 3.
- 1 dose of licensed QIV (as a control group). Substudy B In participants 18 to 64 years of age:
- A dose of qIRV encoding 2 A strains and 2 B strains at a dose level combination 1 or 2.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for phase_1
Started Sep 2021
100 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
June 28, 2021
CompletedStudy Start
First participant enrolled
September 13, 2021
CompletedFirst Posted
Study publicly available on registry
September 22, 2021
CompletedPrimary Completion
Last participant's last visit for primary outcome
January 27, 2023
CompletedStudy Completion
Last participant's last visit for all outcomes
January 27, 2023
CompletedResults Posted
Study results publicly available
March 12, 2024
CompletedMarch 12, 2024
March 1, 2024
1.4 years
June 28, 2021
January 25, 2024
March 8, 2024
Conditions
Keywords
Outcome Measures
Primary Outcomes (35)
Percentage of Participants Reporting Local Reactions After Vaccination 1: Substudy A
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 centimeter (cm). Redness and swelling were graded as mild (Grade 1): greater than (\>) 2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis (redness) and necrosis (swelling). Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Grade 4 reactions were classified by the investigator or medically qualified person. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after Vaccination 1
Percentage of Participants Reporting Local Reactions After Vaccination 2: Substudy A
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Grade 4 reactions were classified by the investigator or medically qualified person. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after Vaccination 2
Percentage of Participants Reporting Systemic Events After Vaccination 1: Substudy A
Systemic events included fever, vomiting, diarrhea, headache,fatigue,chills,new/worsened muscle pain \& new/worsened joint pain \& recorded by participants in an electronic diary.Fever defined as oral temperature greater than equal to(\>=)38.0 degrees Celsius(deg C) \& categorized as\>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C,\>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as:Grade(G)1:1-2 times in 24 hours(h);G2:\>2 times in 24h;G3:required Intravenous (IV) hydration.Diarrhea graded as: G1:2-3 loose stools in 24h;G2: 4-5 loose stools in 24h;G3: 6 or more loose stools in 24h.Headache,fatigue,chills, new/worsened muscle pain \& new/worsened joint pain:G1:didn't interfere with activity;G2: some interference with activity;G3:prevented daily routine activity.For all systemic events except fever, Grade 4=emergency room visit or hospitalization. Grade 4 events were classified by the investigator or medically qualified person.Exact 2-sided confidence interval based on Clopper and Pearson method.
From Day 1 to Day 7 After Vaccination 1
Percentage of Participants Reporting Systemic Events After Vaccination 2: Substudy A
Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: Grade(G) 1: 1-2 times in 24 h; G2: \>2 times in 24 h; G3: required IV hydration. Diarrhea graded as: G1: 2-3 loose stools in 24 h; G2: 4-5 loose stools in 24 h; G3: 6 or more loose stools in 24 h. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G1: didn't interfere with activity; G2: some interference with activity; G3: prevented daily routine activity. For all systemic events except fever, Grade 4= emergency room visit or hospitalization. Grade 4 events were classified by the investigator or medically qualified person. Exact 2-sided confidence interval based on Clopper and Pearson method.
From Day 1 to Day 7 after Vaccination 2
Percentage of Participants Reporting Adverse Events After Vaccination 1: Substudy A
An adverse event (AE) was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Exact 2-sided 95% CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e, excluding local reactions and systematic events) were reported in this outcome measure.
From Day 1 up to 4 weeks After Vaccination 1
Percentage of Participants Reporting Adverse Events After Vaccination 2: Substudy A
An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Exact 2-sided 95% CI was based on the Clopper and Pearson method. Only AEs collected by non-systematic assessment (i.e. excluding local reactions and systemic events) were reported in this outcome measure.
From Day 1 up to 4 weeks After vaccination 2
Percentage of Participants Reporting Serious Adverse Events (SAE) From First Vaccination to 6 Months After Last Vaccination: Substudy A
An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect and was a suspected transmission via a Pfizer product of an infectious agent, pathogenic or non-pathogenic and other important medical event.
From vaccination 1 on day 1 up to 6 months after vaccination 2
Percentage of Participants With Abnormal Hematology Values at 2 Days After Vaccination 1: Substudy A
Hematology parameters included erythrocytes, lymphocytes, neutrophils, eosinophils/leukocytes, erythrocyte (ery) mean corpuscular volume, ery. mean corpuscular hemoglobin and ery. mean corpuscular hemoglobin concentration. The primary criteria were as follows erythrocytes, lymphocytes, neutrophils: \<0.8\*lower limit of normal (LLN); Lymphocytes/Leukocytes, Eosinophils/Leukocytes, Monocytes/Leukocytes: \>1.2\*upper limit of normal (ULN); Ery. Mean Corpuscular Volume:\>1.1\*ULN; Ery. Mean Corpuscular Hemoglobin and Ery.Mean Corpuscular hemoglobin Concentration: \< 0.9\*LLN. Also add 95% CI was based on Clopper and Pearson method.
2 days after vaccination 1
Percentage of Participants With Abnormal Hematology Values at 1 Week After Vaccination 1: Substudy A
Hematology parameters included erythrocytes, neutrophils, eosinophils/leukocytes, monocytes/leukocytes, ery mean corpuscular hemoglobin. The primary criteria were as follows erythrocytes and neutrophils: \<0.8\* LLN; Eosinophils/Leukocytes and Monocytes/Leukocytes: \>1.2\* ULN; Ery. Mean Corpuscular Hemoglobin:\>1.1\*ULN. 95% CI was based on Clopper and Pearson method.
1 week after vaccination 1
Percentage of Participants With Abnormal Chemistry Values at 2 Days After Vaccination 1: Substudy A
Chemistry parameters included blood urea nitrogen and C-reactive protein. The primary criteria were as follows Blood Urea Nitrogen: \> 1.3\*ULN; C Reactive Protein: \> 1.1\*ULN. 95% CI was based on Clopper and Pearson method.
2 days after vaccination 1
Percentage of Participants With Abnormal Chemistry Values at 1 Week After Vaccination 1: Substudy A
Chemistry parameters included blood urea nitrogen and C-reactive protein. The primary criteria were as follows Blood Urea Nitrogen: \> 1.3\*ULN; C Reactive Protein: \> 1.1\*ULN. Also add 95% CI was based on Clopper and Pearson method.
1 week after vaccination 1
Percentage of Participants With Grade Shifts in Hematology Values at 2 Days After Vaccination 1: Substudy A
Hematology parameters included hemoglobin, lymphocytes, neutrophils decrease, platelets decrease, white blood cells (WBC) decrease and WBC increase. Laboratory abnormalities were graded by Food and Drug Administration (FDA) toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in hematology values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 2 days after vaccination 1 were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported.
From Baseline (prior to vaccination 1) to 2 days after vaccination 1
Percentage of Participants With Grade Shifts in Hematology Values at 1 Week After Vaccination 1: Substudy A
Hematology parameters included hemoglobin, lymphocytes, neutrophils decrease, WBC decrease and WBC increase. Laboratory abnormalities were graded by FDA toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in hematology values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 1 week after vaccination 1 were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported.
From Baseline (prior to vaccination 1) to 1 week after vaccination 1
Percentage of Participants With Grade Shifts in Chemistry Laboratory Values at 2 Days After Vaccination 1: Substudy A
Chemistry abnormalities were graded by toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in chemistry values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 2 days after vaccination 1 (post-baseline) were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported. The parameters reported were - Alanine Aminotransferase Increased (ALP), Alkaline Phosphatase Increased (ALP), Aspartate Aminotransferase Increased (AST), Creatinine Increased and Urea Nitrogen.
From Baseline (prior to vaccination 1) to 2 days after vaccination 1
Percentage of Participants With Grade Shifts in Chemistry Laboratory Values at 1 Week After Vaccination 1: Substudy A
Chemistry abnormalities were graded by toxicity grading scale for healthy adult volunteers enrolled in preventive vaccine clinical trials as grade 1=mild; grade 2=moderate; grade 3=severe and grade 4=potentially life-threatening. Percentage of participants with shift in chemistry values were reported in this outcome measure. Categories with at least 1 non-zero data values showing any shift in Grade from baseline to 1 week after vaccination 1 (post-baseline) were reported. Participants whose grade category was unchanged (e.g. normal to normal) were not reported. The parameters reported were - Alanine Aminotransferase Increased, Alkaline Phosphatase Increased, Aspartate Aminotransferase Increased, Creatinine Increased and Urea Nitrogen.
From Baseline (prior to vaccination 1) to 1 week after vaccination 1
Percentage of Participants With New Electrocardiogram (ECG) Abnormalities at 2 Days After Vaccination 1: Substudy A
An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
2 days after vaccination 1
Percentage of Participants With New Electrocardiogram (ECG) Abnormalities at 1 Week After Vaccination 1: Substudy A
An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
1 week after vaccination 1
Percentage of Participants Reporting Local Reactions After Vaccination for 1-Visit Schedule (Initial Enrollment): Substudy B
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after vaccination
Percentage of Participants Reporting Local Reactions After Vaccination 1 for 2- Visit Schedule (Initial Enrollment): Substudy B
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after vaccination 1
Percentage of Participants Reporting Local Reactions After Vaccination 2 for 2- Visit Schedule (Initial Enrollment): Substudy B
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after vaccination 2
Percentage of Participants Reporting Local Reactions After Vaccination for Expanded Enrollment: Substudy B
Local reactions included pain at the injection site, redness and swelling and were recorded by participants in an electronic diary. Redness and swelling were measured and recorded in measuring device units, where 1 measuring device unit=0.5 cm. Redness and swelling were graded as mild (Grade 1): \>2.0 cm to 5.0 cm; moderate (Grade 2): \>5.0 cm to 10.0 cm; severe (Grade 3): \>10 cm; potentially life-threatening (Grade 4): necrosis or exfoliative dermatitis. Pain at injection site was graded as mild (Grade 1): did not interfere with activity; moderate (Grade 2): interfered with activity; severe (Grade 3): prevented daily activity and potentially life-threatening (Grade 4): emergency room visit or hospitalization for severe pain. Exact 2-sided confidence interval was based on the Clopper and Pearson method.
From Day 1 to Day 7 after vaccination 1 for all arms; From Day 1 to Day 7 after vaccination 2 for 2 doses of qIRV (dose level 1), 2-visit schedule arm
Percentage of Participants Reporting Systemic Events After Vaccination for 1-Visit Schedule (Initial Enrollment): Substudy B
Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.
From Day 1 to Day 7 after vaccination
Percentage of Participants Reporting Systemic Events After Vaccination 1 for 2- Visit Schedule (Initial Enrollment): Substudy B
Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.
From Day 1 to Day 7 after vaccination 1
Percentage of Participants Reporting Systemic Events After Vaccination 2 for 2-Visit Schedule (Initial Enrollment) : Substudy B
Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G: 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.
From day 1 to day 7 of vaccination 2
Percentage of Participants Reporting Systemic Events After Vaccination for Expanded Enrollment: Substudy B
Systemic events included fever, vomiting, diarrhea, headache, fatigue, chills, new/worsened muscle pain \& new /worsened joint pain \& recorded by participants in electronic diary. Fever defined as oral temperature \>=38.0 deg C \& categorized as \>=38.0 to 38.4 deg C, \>38.4 to 38.9 deg C, \>38.9 to 40.0 deg C \& \>40.0 deg C. Vomiting graded as: G 1: 1-2 times in 24 hrs; G 2: \>2 times in 24 hrs; G 3: required IV hydration; G 4: emergency room visit/ hospitalization for hypotensive shock. Diarrhea graded as: G 1: 2-3 loose stools in 24 hrs; G 2: 4-5 loose stools in 24 hrs; G 3: 6 or more loose stools in 24 hrs \& G 4: emergency room visit/ hospitalization. Headache, fatigue, chills, new/worsened muscle pain \& new/worsened joint pain: G 1: didn't interfere with activity; G 2: some interference with activity; G 3: prevented daily routine activity \& G 4: emergency room visit/ hospitalization. Exact 2-sided confidence interval based on Clopper and Pearson method.
From Day 1 to Day 7 after vaccination 1 for all arms; From Day 1 to Day 7 after vaccination 2 for 2 doses of qIRV (dose level 1), 2-visit schedule arm
Percentage of Participants Reporting Adverse Events From First Vaccination Until 4 Weeks After Last Vaccination: Substudy B
An AE was defined as any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. Only AEs collected by non-systematic assessment (i.e, excluding local reactions and systematic events) were reported in this outcome measure.
From first vaccination to 4 weeks after last vaccination (i.e., Vaccination 1 for 1-visit schedule arms and Vaccination 2 for 2-visit schedule arms)
Percentage of Participants Reporting Serious Adverse Events From First Vaccination Until 6 Months After Last Vaccination: Substudy B
An SAE was defined as any untoward medical occurrence that, at any dose, met one or more of the following criteria - resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect and was a suspected transmission via a Pfizer product of an infectious agent, pathogenic or non-pathogenic and other important medical event.
From first vaccination to 6 month after last vaccination (i.e., Vaccination 1 for 1-visit schedule arms and Vaccination 2 for 2-visit schedule arms)
Percentage of Participants Reporting Abnormal Troponin I Laboratory Values 2 Days After Vaccination 1 for 2-Visit Schedule (Initial Enrollment): Substudy B
Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination 1 were reported in this outcome measure.
2 days after vaccination 1
Percentage of Participants Reporting Abnormal Troponin I Laboratory Values 2 Days After Vaccination 2 for 2-Visit Schedule (Initial Enrollment): Substudy B
Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination 2 were reported in this outcome measure.
2 days after vaccination 2
Percentage of Participants Reporting Abnormal Troponin I Laboratory Values 2 Days After Vaccination for 1-Visit Schedule (Initial Enrollment): Substudy B
Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination were reported in this outcome measure.
2 days after vaccination
Percentage of Participants Reporting Abnormal Troponin I Laboratory Values 2 Days After Vaccination for Expanded Enrollment: Substudy B
Percentage of participants reporting abnormal troponin I laboratory values 2 days after vaccination were reported in this outcome measure.
2 days after last vaccination (i.e., Vaccination 1 for 1-visit schedule arms and Vaccination 2 for 2-visit schedule arms)
Percentage of Participants Reporting New ECG Abnormalities 2 Days After Vaccination 1 for 2-Visit Schedule (Initial Enrollment): Substudy B
Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
2 days after vaccination 1
Percentage of Participants Reporting New ECG Abnormalities 2 Days After Vaccination 2 for 2-Visit Schedule (Initial Enrollment): Substudy B
Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
2 days after vaccination 2
Percentage of Participants Reporting New ECG Abnormalities 2 Days After Vaccination 1 for 1-Visit Schedule (Initial Enrollment): Substudy B
Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
2 days after vaccination 1
Percentage of Participants Reporting New ECG Abnormalities 2 Days After Vaccination for Expanded Enrollment: Substudy B
Twelve lead ECGs were performed after the participant had rested quietly for at least 10 minutes in a supine position. An ECG abnormality was defined as any new abnormality that, as judged by a cardiologist, was consistent with probable or possible myocarditis or pericarditis, including: Sustained atrial or ventricular arrhythmias, Second-degree Mobitz Type II or worse atrioventricular block, new bundle branch block and Diffuse ST-segment elevation or PR-segment inversion, compatible with pericarditis.
2 days after last vaccination (i.e., Vaccination 1 for 1-visit schedule arms and Vaccination 2 for 2-visit schedule arms)
Secondary Outcomes (26)
Geometric Mean Titers (GMTs) of Hemagglutination Inhibition (HAI) Titers at Weeks 1, 4 and 8 After Vaccination 1: Substudy A
Weeks 1, 4 and 8 after vaccination 1
Geometric Mean Fold Rise (GMFR) in HAI Titers From Before Vaccination to 1, 4, and 8 Weeks After Vaccination 1: Substudy A
Before vaccination to 1, 4 and 8 weeks after vaccination 1
Percentage of Participants Achieving HAI Seroconversion for Each Strain At 1, 4, and 8 Weeks After Vaccination 1: Substudy A
At 1, 4 and 8 Weeks after vaccination 1
Percentage of Participants With HAI Titer >=1:40 for Each Strain Before Vaccination 1 and at 1, 4, and 8 Weeks After Vaccination 1: Substudy A
Before vaccination 1 on day 1 and 1, 4 and 8 weeks after vaccination 1
Percentage of Participants Who Achieved HAI Seroconversion for All Strains at 1, 4, and 8 Weeks After Vaccination 1: qIRV Versus Licensed QIV, Substudy A
At 1, 4, and 8 weeks After vaccination 1
- +21 more secondary outcomes
Study Arms (28)
SSA: mIRV A (dose level 1) + QIV
EXPERIMENTALSSA: mIRV A (dose level 2) + QIV
EXPERIMENTALSSA: mIRV A (dose level 3) + QIV
EXPERIMENTALSSA: mIRV A (dose level 4) + QIV
EXPERIMENTALSSA: mIRV B (dose level 1) + QIV
EXPERIMENTALSSA: mIRV B (dose level 2) + QIV
EXPERIMENTALSSA: mIRV B (dose level 3) + QIV
EXPERIMENTALSSA: mIRV B (dose level 4) + QIV
EXPERIMENTALSSA: bIRV AB (dose level combination 1) + QIV
EXPERIMENTALSSA: bIRV AB (dose level combination 2) + QIV
EXPERIMENTALSSA: bIRV AB (dose level combination 3) + QIV
EXPERIMENTALSSA: bIRV AB (dose level combination 4) + QIV
EXPERIMENTALSSA: QIV + mIRV A strain (dose level 4)
EXPERIMENTALSSA: qIRV (dose level 1) + QIV
EXPERIMENTALSSA: QIV + mIRV B strain (dose level 4)
EXPERIMENTALSSB: 2 doses of qIRV (dose level 1), 2-visit schedule
EXPERIMENTALSSB: 2 doses of QIV, 2-visit schedule
EXPERIMENTALSSB: QIV + bIRV AA (dose level combination 1), 2-visit schedule
EXPERIMENTALSSB: QIV + bIRV AA (dose level combination 2), 2-visit schedule
EXPERIMENTALSSB: QIV + bIRV AA (dose level combination 1), 1-visit schedule
EXPERIMENTALSSB: QIV + bIRV AA (dose level combination 2), 1-visit schedule
EXPERIMENTALSSB: qIRV (dose level 2, dose combination 1), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered.
SSB: qIRV (dose level 2, dose combination 2), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered
SSB: qIRV (dose level 3), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered
SSB: bIRV AA + bIRV BB (both dose level combination 1), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered
SSB: 1 dose of QIV, 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered
SSB: qIRV (dose level 1), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered.
SSB: qIRV (dose level 2), 1-visit schedule
EXPERIMENTALNOTE: Arm Description has not been entered.
Interventions
Intramuscular injection
Intramuscular injection
Intramuscular injection
Intramuscular injection
Intramuscular injection
Intramuscular injection
Eligibility Criteria
You may qualify if:
- Male or female participants 65 to 85 years of age.
- Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures.
- Male participant who is able to father children and willing to use an acceptable method of contraception; or female participant not of childbearing potential; or male participant not able to father children.
- Capable of giving signed informed consent.
You may not qualify if:
- Other medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.
- History of severe adverse reaction associated with a vaccine and/or severe allergic reaction (eg, anaphylaxis) to any component of the study intervention.
- Immunocompromised individuals with known or suspected immunodeficiency, as determined by history and/or laboratory/physical examination.
- Bleeding diathesis or condition associated with prolonged bleeding that would, in the opinion of the investigator, contraindicate intramuscular injection.
- Women who are pregnant or breastfeeding.
- Allergy to egg proteins (egg or egg products) or chicken proteins.
- Participant who has had significant exposure to laboratory-confirmed SARS-CoV-2 infection, COVID-19, or influenza in the past 14 days known prior to Visit 1
- Any participant who has a SARS-CoV-2 RT-PCR or antigen test in the past 10 days prior to Visit 1 that has not been confirmed as negative.
- Individuals who receive treatment with radiotherapy or immunosuppressive therapy, including cytotoxic agents or systemic corticosteroids, eg, for cancer or an autoimmune disease, or planned receipt throughout the study.
- Receipt of blood/plasma products, immunoglobulin, or monoclonal antibodies, from 60 days before study intervention administration, or planned receipt throughout the study.
- Vaccination with any influenza vaccine within 6 months (175 days) before study intervention administration.
- Any participant who has received or plans to receive a modRNA-platform SARS-CoV-2 vaccine within 60 days of Visit 1
- Participation in other studies involving study intervention within 28 days prior to study entry and/or during study participation.
- Screening hematology/blood chemistry lab \>=Grade 1 abnormality. Except Bilirubin, other stable Grade1 abnormalities may be considered eligible by Investigator.
- Screening ECG that is consistent with probable or possible myocarditis or pericarditis, or demonstrates clinically relevant abnormalities that may affect participant safety or study results.
- +26 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Pfizerlead
Study Sites (100)
North Alabama Research Center
Athens, Alabama, 35611, United States
The Heart Center
Athens, Alabama, 35611, United States
Arizona Heart Rhythm Center
Phoenix, Arizona, 85016, United States
HOPE Research Institute
Phoenix, Arizona, 85018, United States
The Pain Center of Arizona
Phoenix, Arizona, 85018, United States
Noble Clinical Research
Tucson, Arizona, 85704, United States
Pima Heart and Vascular
Tucson, Arizona, 85704, United States
Inland Valley Cardiovascular Center
Murrieta, California, 92563, United States
Orange County Heart Institute
Orange, California, 92868, United States
Artemis Institute for Clinical Research
Riverside, California, 92503, United States
Orange County Research Center
Tustin, California, 92780, United States
Pediatrics-Infectious Diseases - Clinical Trials Center at University of Colorado Anschutz Medical C
Aurora, Colorado, 80045, United States
UCHealth Heart and Vascular Center - Anschutz Medical Campus
Aurora, Colorado, 80045, United States
Yale University School of Medicine
New Haven, Connecticut, 06510, United States
Yale Cardiology
New Haven, Connecticut, 06519, United States
Yale University School of Medicine
New Haven, Connecticut, 06519, United States
Alliance for Multispecialty Research, LLC
Coral Gables, Florida, 33134, United States
Halifax Health Medical Center
Daytona Beach, Florida, 32114, United States
NYU Langone Cardiology Associates
Delray Beach, Florida, 33484, United States
First Coast Heart & Vascular Center
Fleming Island, Florida, 32003, United States
Fleming Island Center for Clinical Research
Fleming Island, Florida, 32003, United States
Proactive Clinical Research,LLC
Fort Lauderdale, Florida, 33308, United States
Alliance for Multispecialty Research, LLC
Fort Myers, Florida, 33912, United States
Millennium Physician Group
Fort Myers, Florida, 33912, United States
Robert B. Pritt, DO
Fort Myers, Florida, 33912, United States
Direct Helpers Research Center.
Hialeah, Florida, 33012, United States
Best Quality Research,Inc.
Hialeah, Florida, 33016, United States
Elixia Infectious Disease, LLC
Hollywood, Florida, 33024, United States
First Coast Heart & Vascular Center
Jacksonville, Florida, 32216, United States
Clinical Neuroscience Solutions, Inc. dba CNS Healthcare
Jacksonville, Florida, 32256, United States
First Coast Cardiovascular Institute
Jacksonville, Florida, 32256, United States
Premier Cardiology and Vascular Associates
Maitland, Florida, 32751, United States
LMG Research
Miami, Florida, 33125, United States
Millennium Clinical Research
Miami, Florida, 33125, United States
Optimus U Corporation
Miami, Florida, 33125, United States
Suncoast Research Group
Miami, Florida, 33135, United States
Schiff Center for Liver Diseases/University of Miami
Miami, Florida, 33136, United States
University of Miami Hospital
Miami, Florida, 33136, United States
Dr Gerardo A. Polanco, MD
Miami, Florida, 33156, United States
Research Institute of South Florida
Miami, Florida, 33173, United States
Entrust Clinical Research
Miami, Florida, 33176, United States
Jackson Medical Group Cardiac Care
Miami, Florida, 33176, United States
Miami Dade Medical Research Institute, LLC
Miami, Florida, 33176, United States
Clinical Neuroscience Solutions, Inc.
Orlando, Florida, 32801, United States
Central Florida Cardiology Group
Orlando, Florida, 32803, United States
Innovation Medical Research Center
Palmetto Bay, Florida, 33157, United States
DBC Research USA
Pembroke Pines, Florida, 33029, United States
Progressive Medical Research
Port Orange, Florida, 32127, United States
My Cardiologist
South Miami, Florida, 33143, United States
Precision Clinical Research
Sunrise, Florida, 33351, United States
Genesis Clinical Research, LLC
Tampa, Florida, 33603, United States
Conquest Research
Winter Park, Florida, 32789, United States
Centricity Research Columbus Georgia Multispecialty
Columbus, Georgia, 31904, United States
IACT Health
Columbus, Georgia, 31904, United States
IACT Health
Rincon, Georgia, 31326, United States
East-West Medical Research Institute
Honolulu, Hawaii, 96814, United States
University of Iowa
Iowa City, Iowa, 52242, United States
Alliance for Multispecialty Research, LLC
Wichita, Kansas, 67205, United States
Alliance for Multispecialty Research, LLC
Wichita, Kansas, 67207, United States
Heartland Cardiology, LLC
Wichita, Kansas, 67226, United States
Centennial Medical Group
Elkridge, Maryland, 21075, United States
Associates of Cardiology
Silver Spring, Maryland, 20910, United States
Henry Ford Hospital
Detroit, Michigan, 48202, United States
Pioneer Heart Institute
Lincoln, Nebraska, 68506, United States
Velocity Clinical Research, Norfolk
Norfolk, Nebraska, 68701, United States
Meridian Clinical Research - 3345 North 107th Street
Omaha, Nebraska, 68134, United States
Velocity Clinical Research, Omaha
Omaha, Nebraska, 68134, United States
Sanjay Vohra, MD, F.A.C.C.
Henderson, Nevada, 89074, United States
Wr-Crcn, Llc.
Las Vegas, Nevada, 89106, United States
Excel Clinical Research, LLC
Las Vegas, Nevada, 89109, United States
Las Vegas Clinical Trials
North Las Vegas, Nevada, 89030, United States
Hassman Research Institute
Berlin, New Jersey, 08009, United States
Penn Medicine
Somers Point, New Jersey, 08244, United States
South Jersey Infectious Disease
Somers Point, New Jersey, 08244, United States
NYU Langone - Center for the Prevention of Cardiovascular Disease
New York, New York, 10016, United States
NYU Langone Health
New York, New York, 10016, United States
Rochester General Hospital Infectious Disease
Rochester, New York, 14621, United States
Rochester General Hospital
Rochester, New York, 14621, United States
University of Rochester Medical Center
Rochester, New York, 14642, United States
Upstate Health Care Center-University Cardiovascular Group of Syracuse
Syracuse, New York, 13202, United States
SUNY Upstate Medical University Global Health Research Unit
Syracuse, New York, 13215, United States
M3-Emerging Medical Research, LLC
Durham, North Carolina, 27704, United States
Carolina Institute for Clinical Research
Fayetteville, North Carolina, 28303, United States
Monroe Biomedical Research
Monroe, North Carolina, 28112, United States
University Hospitals Cleveland Medical Center
Cleveland, Ohio, 44106, United States
Aventiv Research Inc.
Columbus, Ohio, 43213, United States
Centricity Research Columbus Ohio Multispecialty
Columbus, Ohio, 43213, United States
Columbus Cardiovascular Associates, Inc
Columbus, Ohio, 43213, United States
Pennsylvania Heart and Vascular Group
Jenkintown, Pennsylvania, 19046, United States
Main Street Physician's Care
Little River, South Carolina, 29566, United States
Prolato Clinical Research Center
Houston, Texas, 77054, United States
DM Clinical Research
Houston, Texas, 77065, United States
DM Clinical Research
Humble, Texas, 77338, United States
Cedar Health Research
Irving, Texas, 75062, United States
Harmony Heart Group
Plano, Texas, 75093, United States
Mt Olympus Medical Research
Sugar Land, Texas, 77479, United States
DM Clinical Research
Tomball, Texas, 77375, United States
Northwest Heart Center
Tomball, Texas, 77375, United States
Centricity Research Suffolk Primary Care
Suffolk, Virginia, 23435, United States
Sentara BelleHarbour
Suffolk, Virginia, 23435, United States
Related Publications (1)
Branche A, Mulligan MJ, Maniar A, Puente O, Oladipupo I, Crowther G, Zareba AM, Yi Z, Scully I, Gomme E, Koury K, Kitchin N, Allen PS, Anderson AS, Gurtman A, Lindert K. A Phase 1/2 Randomized Study to Evaluate the Safety, Tolerability, and Immunogenicity of Nucleoside-Modified Messenger RNA Influenza Vaccines in Healthy Adults. Vaccines (Basel). 2025 Apr 3;13(4):383. doi: 10.3390/vaccines13040383.
PMID: 40333267DERIVED
Related Links
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Results Point of Contact
- Title
- Pfizer ClinicalTrials.gov Call Center
- Organization
- Pfizer Inc.
Study Officials
- STUDY DIRECTOR
Pfizer CT.gov Call Center
Pfizer
Publication Agreements
- PI is Sponsor Employee
- No
- Restriction Type
- OTHER
- Restrictive Agreement
- Yes
Study Design
- Study Type
- interventional
- Phase
- phase 1
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Masking Details
- SSA: observer-blinded, sponsor unblind SSB: single-blind, sponsor unblind
- Purpose
- PREVENTION
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
June 28, 2021
First Posted
September 22, 2021
Study Start
September 13, 2021
Primary Completion
January 27, 2023
Study Completion
January 27, 2023
Last Updated
March 12, 2024
Results First Posted
March 12, 2024
Record last verified: 2024-03
Data Sharing
- IPD Sharing
- Will share
Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical\_trials/trial\_data\_and\_results/data\_requests.