NCT04605159

Brief Summary

The purpose of this study was to evaluate the ability of a single dose of the investigational RSV Maternal vaccine, administered intramuscularly (IM) to pregnant women aged 18-49 years, in good general maternal health, in preventing medically assessed RSV associated Lower Respiratory Tract Illnesses (LRTIs) in infants born to vaccinated mothers. The study also evaluated the safety of the investigational RSV Maternal vaccine both in vaccinated mothers and in their corresponding infant. Following a recommendation from the Independent Data Monitoring Committee of NCT04605159 (RSV MAT 009), GSK made the decision to stop enrolment and vaccination in the study. Ongoing study participants at that time continued to be monitored as part of the study.

Trial Health

68
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Strong global presence with extensive site network
Enrollment
11,194

participants targeted

Target at P75+ for phase_3

Timeline
Completed

Started Nov 2020

Typical duration for phase_3

Geographic Reach
24 countries

159 active sites

Status
terminated

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

October 22, 2020

Completed
5 days until next milestone

First Posted

Study publicly available on registry

October 27, 2020

Completed
24 days until next milestone

Study Start

First participant enrolled

November 20, 2020

Completed
2.6 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

June 14, 2023

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

June 14, 2023

Completed
1.2 years until next milestone

Results Posted

Study results publicly available

September 5, 2024

Completed
Last Updated

February 20, 2025

Status Verified

February 1, 2025

Enrollment Period

2.6 years

First QC Date

October 22, 2020

Results QC Date

June 13, 2024

Last Update Submit

February 4, 2025

Conditions

Outcome Measures

Primary Outcomes (7)

  • Number of Infant Participants With Medically Assessed, RSV-associated Lower Respiratory Tract Illnesses (LRTIs) of Any Severity and RSV-associated Severe LRTIs From Birth to Day 181 Post-birth

    An RSV-associated LRTI of any severity was characterized by a history of cough OR difficulty in breathing, AND a blood oxygen saturation by pulse oximetry (SpO2) lower than (\<) 95%, OR respiratory rate increase AND a confirmed RSV infection. An RSV-associated severe LRTI met the case definition of RSV-LRTI AND was additionally characterized by a SpO2 \<93%, OR lower chest wall in-drawing, OR inability to feed, OR failure to respond/unconscious. Medically assessed = the infant was evaluated by a healthcare professional for the LRTI.

    From birth to Day 181 post-birth

  • Number of Infant Participants With at Least One Serious Adverse Event (SAE) From Birth to Day 181 Post-birth

    An SAE is defined as any untoward medical occurrence that resulted in death, was life-threatening, required hospitalization or prolongation of existing hospitalization, resulted in disability/incapacity, was a congenital anomaly/birth defect or resulted in other situations that were considered serious per medical or scientific judgment. At least one SAE = occurrence of at least one SAE regardless of intensity grade or relation to vaccination.

    From birth to Day 181 post-birth

  • Number of Infant Participants With at Least One Adverse Event (AE) Leading to Study Withdrawal From Birth to Day 181 Post-birth

    A participant was considered a 'withdrawal' from the study when no study procedure has occurred, no follow-up has been performed and no further information has been collected for this participant from the date of withdrawal/last contact. Participants who were withdrawn from the study because of AEs were clearly distinguished from participants who were withdrawn for other reasons. Investigators followed participants who were withdrawn from the study as a result of an AE until the event was resolved. At least one AE leading to study withdrawal = occurrence of at least one AE leading to study withdrawal regardless of intensity grade or relation to vaccination.

    From birth to Day 181 post-birth

  • Number of Infant Participants With at Least One Medically Attended AE (MAE) From Birth to Day 181 Post-birth

    An MAE is defined as an unsolicited AE, such as a symptom or illness, which required hospitalization, or emergency room visit, or visit to/by a health care provider. At least one MAE = occurrence of at least one MAE regardless of intensity grade or relation to vaccination.

    From birth to Day 181 post-birth

  • Number of Infant Participants With at Least One SAE From Birth to Day 366 Post-birth

    An SAE is defined as any untoward medical occurrence that resulted in death, was life-threatening, required hospitalization or prolongation of existing hospitalization, resulted in disability/incapacity, was a congenital anomaly/birth defect or resulted in other situations that were considered serious per medical or scientific judgment. At least one SAE = occurrence of at least one SAE regardless of intensity grade or relation to vaccination.

    From birth to Day 366 post-birth

  • Number of Infant Participants With at Least One AE Leading to Study Withdrawal From Birth to Day 366 Post-birth

    A participant was considered a 'withdrawal' from the study when no study procedure has occurred, no follow-up has been performed and no further information has been collected for this participant from the date of withdrawal/last contact. Participants who were withdrawn from the study because of AEs were clearly distinguished from participants who were withdrawn for other reasons. Investigators followed participants who were withdrawn from the study as a result of an AE until the event was resolved. At least one AE leading to study withdrawal = occurrence of at least one AE leading to study withdrawal regardless of intensity grade or relation to vaccination.

    From birth to Day 366 post-birth

  • Number of Infant Participants With at Least One MAE From Birth to Day 366 Post-birth

    An MAE is defined as an unsolicited AE, such as a symptom or illness, which required hospitalization, or emergency room visit, or visit to/by a health care provider. At least one MAE = occurrence of at least one MAE regardless of intensity grade or relation to vaccination.

    From birth to Day 366 post-birth

Secondary Outcomes (30)

  • Number of Infant Participants With RSV-associated Hospitalizations From Birth to Day 181 Post-birth

    From birth to Day 181 post-birth

  • Number of Infant Participants With All-cause LRTIs From Birth to Day 181 Post-birth

    From birth to Day 181 post-birth

  • Number of Infant Participants With All-cause LRTIs With Hospitalization From Birth to Day 181 Post-birth

    From birth to Day 181 post-birth

  • Number of Infant Participants With Medically Assessed, RSV-associated Severe LRTIs From Birth to Day 366 Post-birth

    From birth to Day 366 post-birth

  • Number of Infant Participants With Medically Assessed, RSV-associated LRTIs of Any Severity From Birth to Day 366 Post-birth

    From birth to Day 366 post-birth

  • +25 more secondary outcomes

Study Arms (4)

RSV MAT Group - Mother

EXPERIMENTAL

Maternal participants received a single dose of the RSV MAT vaccine administered at Day 1 in this study.

Biological: RSV MAT

Placebo Group - Mother

PLACEBO COMPARATOR

Maternal participants received a single dose of placebo administered at Day 1 in this study.

Drug: Placebo

RSV MAT Group - Infant

NO INTERVENTION

This group consisted of infants born to mothers (from RSV MAT Group - Mother) who received a single dose of RSV MAT vaccine during pregnancy.

Placebo Group - Infant

NO INTERVENTION

This group consisted of infants born to mothers (from Placebo Group - Mother) who received a single dose of placebo during pregnancy.

Interventions

RSV MATBIOLOGICAL

One dose of RSV MAT vaccine reconstituted with NaCl solution, administered intramuscularly in the non-dominant arm at Day 1.

RSV MAT Group - Mother

One dose of placebo (lyophilized sucrose reconstituted with NaCl solution) administered intramuscularly in the non-dominant arm at Day 1.

Placebo Group - Mother

Eligibility Criteria

Age18 Years - 49 Years
Sexfemale
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Maternal participants
  • Participants who, in the opinion of the investigator, can and will comply with the requirements of the protocol.
  • Participants who give written or witnessed/thumb printed informed consent after the study has been explained, and before any study specific procedures are performed, as per local regulations regulatory requirements.
  • Age 18 to 49 years, inclusive, at the time of study intervention.
  • Pre-pregnancy BMI 17.0 to 39.9 kg/m2, inclusive.
  • In good general maternal health as established by medical history and clinical examination before entering into the study.
  • Singleton pregnancy (including instances where the singleton pregnancy derives from a vanishing twin syndrome).
  • At 24\^0/7 to 34\^0/7 weeks of gestation at the time of study vaccination (Visit 1), as established by:
  • last menstrual period (LMP) date corroborated by first or second trimester ultrasound examination (U/S) i.e. at or before 28 weeks of gestation.
  • st or 2nd trimester U/S only, if LMP is unknown/uncertain
  • Certain LMP, corroborated by an U/S performed after 28 weeks of gestation is also acceptable.
  • No fetal genetic abnormalities (based on genetic testing, if performed).
  • No significant congenital malformations, as assessed by fetal anomaly ultrasound scan conducted at or beyond 18 weeks of gestation.
  • Willing to provide cord blood.
  • Who do not plan to give their child for adoption.
  • +5 more criteria

You may not qualify if:

  • Maternal participants Medical conditions
  • History of allergic disease or reactions likely to be exacerbated by any component of the RSV vaccine
  • Hypersensitivity to latex
  • Significant complications in the current pregnancy:
  • Gestational hypertension unless blood pressure it is controlled and maintained in the normal range (\<140mmHg and \<90mmHg) through diet and/or antihypertensive medications
  • Gestational diabetes not controlled by medication, diet and/or exercise
  • Pre-eclampsia
  • Eclampsia
  • Intrauterine Growth Restriction/Fetal Growth Restriction
  • Placenta previa
  • Placental abruption, placenta accreta/percreta/increta, chorioamnionitis or any abnormalities that can impair the maternal-fetal circulation
  • Polyhydramnios
  • Oligohydramnios
  • Preterm labour or history of preterm labour in the current pregnancy
  • Any intervention to prevent preterm delivery or medical treatment for suspected preterm delivery, including administration of systemic corticosteroids for fetal lung maturation
  • +37 more criteria

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (159)

GSK Investigational Site

Birmingham, Alabama, 35205, United States

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GSK Investigational Site

Dothan, Alabama, 36305, United States

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GSK Investigational Site

Mobile, Alabama, 36608, United States

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GSK Investigational Site

Phoenix, Arizona, 85006, United States

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GSK Investigational Site

Tucson, Arizona, 85712, United States

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GSK Investigational Site

Burbank, California, 91506, United States

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GSK Investigational Site

Los Angeles, California, 90057, United States

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GSK Investigational Site

Miami, Florida, 33174, United States

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GSK Investigational Site

Blackfoot, Idaho, 83221, United States

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GSK Investigational Site

Idaho Falls, Idaho, 83404, United States

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GSK Investigational Site

Nampa, Idaho, 83686, United States

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GSK Investigational Site

Nampa, Idaho, 83687, United States

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GSK Investigational Site

Covington, Louisiana, 70433, United States

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GSK Investigational Site

Lafayette, Louisiana, 70508, United States

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GSK Investigational Site

Slidell, Louisiana, 70458, United States

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GSK Investigational Site

Detroit, Michigan, 48201, United States

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GSK Investigational Site

Saginaw, Michigan, 48604, United States

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GSK Investigational Site

Missoula, Montana, 59804, United States

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GSK Investigational Site

Grand Island, Nebraska, 68803, United States

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GSK Investigational Site

Lincoln, Nebraska, 68516, United States

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GSK Investigational Site

Albuquerque, New Mexico, 87102, United States

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GSK Investigational Site

Englewood, Ohio, 45322, United States

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GSK Investigational Site

Greenville, South Carolina, 29607, United States

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GSK Investigational Site

Hendersonville, Tennessee, 29708, United States

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GSK Investigational Site

Arlington, Texas, 75050, United States

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GSK Investigational Site

Austin, Texas, 78705, United States

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GSK Investigational Site

Burleson, Texas, 76028, United States

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GSK Investigational Site

Dallas, Texas, 75231, United States

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GSK Investigational Site

Fort Worth, Texas, 76104, United States

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GSK Investigational Site

Georgetown, Texas, 78626, United States

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GSK Investigational Site

Houston, Texas, 13760, United States

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GSK Investigational Site

Houston, Texas, 77008, United States

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GSK Investigational Site

Houston, Texas, 77058, United States

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GSK Investigational Site

Keller, Texas, 76248, United States

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GSK Investigational Site

Lampasas, Texas, 76550, United States

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GSK Investigational Site

League City, Texas, 77573, United States

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GSK Investigational Site

McAllen, Texas, 78503, United States

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GSK Investigational Site

Mesquite, Texas, 75149, United States

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GSK Investigational Site

Plano, Texas, 75093, United States

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GSK Investigational Site

Weatherford, Texas, 76086, United States

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GSK Investigational Site

Norfolk, Virginia, 68701, United States

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GSK Investigational Site

Buenos Aires, 1425, Argentina

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GSK Investigational Site

Ciudad AutOnoma de Buenos Aire, C1141ACG, Argentina

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GSK Investigational Site

Ciudad AutOnoma de Buenos Aire, C1425EFD, Argentina

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GSK Investigational Site

Córdoba, 5800, Argentina

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GSK Investigational Site

San Miguel de Tucumán, T4000IHE, Argentina

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GSK Investigational Site

South Brisbane, Queensland, 4101, Australia

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Southport, Queensland, 4215, Australia

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Clayton, Victoria, 3168, Australia

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GSK Investigational Site

Geelong, Victoria, 3220, Australia

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GSK Investigational Site

Nedlands, Western Australia, 6009, Australia

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GSK Investigational Site

Matlab, Bangladesh

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Sylhet, 3100, Bangladesh

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Genk, 3600, Belgium

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Ghent, 9000, Belgium

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Kortrijk, 8500, Belgium

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GSK Investigational Site

Leuven, 3000, Belgium

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GSK Investigational Site

Sint-Niklaas, 9100, Belgium

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GSK Investigational Site

Caxias do Sul, 95070-560, Brazil

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Nova Iguaçu, 26030-380, Brazil

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Porto Alegre, 90035001, Brazil

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RibeirAo PretoSP, 14048-900, Brazil

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Santa Maria, 97105-900, Brazil

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GSK Investigational Site

São José do Rio Preto, 15090-000, Brazil

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GSK Investigational Site

Halifax, Nova Scotia, B3K 6R8, Canada

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Kingston, Ontario, K7L 2V7, Canada

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Montreal, Quebec, H3T 1C5, Canada

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Québec, Quebec, G1V 4G2, Canada

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Barranquilla, 760002, Colombia

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Bogotá, 110111, Colombia

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Cali Colombia, 760042, Colombia

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Chía, 250001, Colombia

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Medellín, 110111, Colombia

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Medellín, 50042, Colombia

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Santo Domingo Este, Dominican Republic

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Helsinki, 00290, Finland

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Kokkola, 67100, Finland

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Oulu, 90220, Finland

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Tampere, 33100, Finland

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Turku, 20520, Finland

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Bordeaux, 33000, France

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Clermont-Ferrand, 63100, France

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Montpellier, 34295, France

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Paris, 75679, France

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Pierre-Bénite, 69495, France

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Comayagua, Honduras

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San Pedro Sula, 21101, Honduras

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Kolkata, 700017, India

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Mangalore, 575001, India

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Mysore, 570015, India

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Nagpur, 441108, India

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Pune, 411043, India

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GSK Investigational Site

Vadu Budruk Pune, 412216, India

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Bari, 70124, Italy

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Messina, 98124, Italy

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Milan, 20122, Italy

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Milan, 20142, Italy

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Milan, 20154, Italy

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Milan, 20162, Italy

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Novara, 28100, Italy

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Palermo, 90127, Italy

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Prato, 59100, Italy

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Verona, 37126, Italy

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Chihuahua City, 31000, Mexico

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Monterrey, 64460, Mexico

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Monterrey, 64570, Mexico

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Morelia, 58260, Mexico

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Oaxaca City, 68000, Mexico

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GSK Investigational Site

San Juan del Río, 76800, Mexico

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GSK Investigational Site

San Luis Potosí City, 78200, Mexico

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GSK Investigational Site

Grafton Auckland, 1010, New Zealand

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GSK Investigational Site

Papatoetoe Auckland, 1701, New Zealand

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Wellington, 6021, New Zealand

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Panama City, 0801, Panama

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GSK Investigational Site

Panama City, 1001, Panama

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GSK Investigational Site

Panama City, 32401, Panama

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GSK Investigational Site

Panama City, 7096, Panama

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GSK Investigational Site

Cavite, 4114, Philippines

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Manila, 1000, Philippines

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GSK Investigational Site

Manila, 1008, Philippines

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GSK Investigational Site

Johannesburg, 2112, South Africa

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Pretoria, 0184, South Africa

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Soshanguve, 0152, South Africa

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Soweto, 2117, South Africa

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GSK Investigational Site

Daegu, 42601, South Korea

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GSK Investigational Site

Seoul, 08308, South Korea

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GSK Investigational Site

Seoul, 3080, South Korea

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GSK Investigational Site

Aravaca, 28023, Spain

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GSK Investigational Site

Barcelona, 08028, Spain

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GSK Investigational Site

Barcelona, 08035, Spain

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GSK Investigational Site

Barcelona, 08950, Spain

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GSK Investigational Site

Bilbao, 48013, Spain

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GSK Investigational Site

Boadilla Del Monte Madrid, 28660, Spain

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GSK Investigational Site

Burgos, 09006, Spain

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GSK Investigational Site

Getafe, 28905, Spain

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GSK Investigational Site

Madrid, 28007, Spain

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GSK Investigational Site

Madrid, 28041, Spain

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Madrid, 28046, Spain

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GSK Investigational Site

Madrid, 28222, Spain

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Madrid, 28400, Spain

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Marbella, 29603, Spain

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Málaga, 29004, Spain

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GSK Investigational Site

Málaga, 29010, Spain

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GSK Investigational Site

Seville, 41013, Spain

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GSK Investigational Site

Seville, 41014, Spain

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GSK Investigational Site

TorrejOn Ardoz Madrid, 28850, Spain

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GSK Investigational Site

Valencia, 46017, Spain

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Valencia, 46702, Spain

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GSK Investigational Site

Valladolid, 47012, Spain

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GSK Investigational Site

Changhua, 500, Taiwan

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GSK Investigational Site

Kaohsiung City, 833, Taiwan

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GSK Investigational Site

Taichung, 40447, Taiwan

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GSK Investigational Site

Taipei, 0105, Taiwan

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GSK Investigational Site

Taipei, 10041, Taiwan

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GSK Investigational Site

Taipei, 10449, Taiwan

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GSK Investigational Site

Taoyuan District, 333, Taiwan

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GSK Investigational Site

Bangkok, 10330, Thailand

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GSK Investigational Site

Chiang Mai, 50200, Thailand

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GSK Investigational Site

Edinburgh, EH16 4SA, United Kingdom

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Related Publications (3)

  • Dieussaert I, Hyung Kim J, Luik S, Seidl C, Pu W, Stegmann JU, Swamy GK, Webster P, Dormitzer PR. RSV Prefusion F Protein-Based Maternal Vaccine - Preterm Birth and Other Outcomes. N Engl J Med. 2024 Mar 14;390(11):1009-1021. doi: 10.1056/NEJMoa2305478.

    PMID: 38477988BACKGROUND
  • Banooni P, Gonik B, Epalza C, Reyes O, Madhi SA, Gomez-Go GD, Zaman K, Llapur CJ, Lopez-Medina E, Stanley T, Kantele A, Huang LM, Mussi-Pinhata MM, Dewulf J, Langley JM, Seidl C, Ota M, Kirabo M, Anspach B, Dieussaert I, Henry O, Kim JH, Picciolato M. Efficacy, immunogenicity, and safety of an investigational maternal respiratory syncytial virus prefusion F protein-based vaccine. Clin Infect Dis. 2025 Jan 29:ciaf033. doi: 10.1093/cid/ciaf033. Online ahead of print.

  • Ginsburg AS, Srikantiah P. Respiratory syncytial virus: promising progress against a leading cause of pneumonia. Lancet Glob Health. 2021 Dec;9(12):e1644-e1645. doi: 10.1016/S2214-109X(21)00455-1. Epub 2021 Nov 11. No abstract available.

MeSH Terms

Conditions

Respiratory Syncytial Virus Infections

Condition Hierarchy (Ancestors)

Pneumovirus InfectionsParamyxoviridae InfectionsMononegavirales InfectionsRNA Virus InfectionsVirus DiseasesInfections

Results Point of Contact

Title
GSK Response Center
Organization
GlaxoSmithKline

Study Officials

  • GSK Clinical Trials

    GlaxoSmithKline

    STUDY DIRECTOR

Publication Agreements

PI is Sponsor Employee
No
Restriction Type
OTHER
Restrictive Agreement
Yes

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
QUADRUPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Following the decision to stop enrollment and vaccination, the study/site staff and maternal participants no longer stayed blinded.
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR

Study Record Dates

First Submitted

October 22, 2020

First Posted

October 27, 2020

Study Start

November 20, 2020

Primary Completion

June 14, 2023

Study Completion

June 14, 2023

Last Updated

February 20, 2025

Results First Posted

September 5, 2024

Record last verified: 2025-02

Data Sharing

IPD Sharing
Will share

GSK will assess requests from qualified researchers for anonymized individual patient-level data (IPD) and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/About\_GSK\_Patient\_Level\_Data\_Sharing\_Final\_13July2023.pdf

Shared Documents
STUDY PROTOCOL, SAP, ICF, CSR
Time Frame
Anonymized IPD is made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or terminated asset(s) across all indications.
Access Criteria
Anonymized IPD is shared with researchers whose proposals are approved by an Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months but an extension may be granted, when justified, for up to 6 months.
More information

Locations