NCT05132855

Brief Summary

The severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) specific antibody and neutralizing antibody level induced by adenovirus vector vaccines were lower than mRNA vaccines. Vaccine efficacy of ChAdOx1 nCoV-19 was lower than BNT162b2 and mRNA 1273 in clinical trials. The emergence of highly transmissible and mutant variants of SARS-COV-2 has raised the concern of COVID-19 vaccine effectiveness. The complete vaccination rate is still low in Taiwan. Strict border control measures are imposed by Central Epidemic Command Center. However, the measure of quarantine for flight crew is considered one of the breach of COVID-19 infection control. Despite most of the flight crew has fully vaccinated, several episodes of breakthrough infection occurred among flight crew resulting in domestic infection recently. Low neutralizing antibody was found in a proportion of fully vaccinated flight crew and healthcare workers. A 3rd booster COVID-19 dose is considered for flight crew and healthcare workers. This study is to determine the safety, reactogenicity, and immunogenicity of heterologous 3rd booster of mRNA and protein COVID-19 vaccines.

Trial Health

43
At Risk

Trial Health Score

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

Trial has exceeded expected completion date
Enrollment
340

participants targeted

Target at P75+ for phase_1 covid19

Timeline
Completed

Started Nov 2021

Typical duration for phase_1 covid19

Geographic Reach
1 country

1 active site

Status
unknown

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

November 11, 2021

Completed
13 days until next milestone

First Posted

Study publicly available on registry

November 24, 2021

Completed
6 days until next milestone

Study Start

First participant enrolled

November 30, 2021

Completed
1.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2023

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 1, 2023

Completed
Last Updated

July 25, 2022

Status Verified

November 1, 2021

Enrollment Period

1.3 years

First QC Date

November 11, 2021

Last Update Submit

July 21, 2022

Conditions

Keywords

COVID-19Breakthrough infectionHeterologous vaccine boostermRNA vaccineProtein subunit vaccine

Outcome Measures

Primary Outcomes (4)

  • The immune response after heterologous boost third dose of COVID-19 vaccines after homologous prime-boost AZD1222 vaccination

    Immunogenicity studies include SARS-CoV-2 anti-spike IgG, the 50% neutralizing antibody titer (NT50) and IFN - secreting T cells specific to whole spike protein.

    Day 28 after third dose boost

  • The immune response after heterologous boost third dose of COVID-19 vaccines after homologous prime-boost AZD1222 vaccination

    Immunogenicity studies include SARS-CoV-2 anti-spike IgG, the 50% neutralizing antibody titer (NT50), IFN - secreting T cells specific to whole spike protein, and Memory T cell epitopes and memory B cell epitopes by flow cytometry.

    Day 180 after third dose boost

  • The immune response after heterologous boost fourth dose of COVID-19 vaccines after homologous prime-boost AZD1222 vaccination

    Immunogenicity studies include SARS-CoV-2 anti-spike IgG, the 50% neutralizing antibody titer (NT50), IFN - secreting T cells specific to whole spike protein, and Memory T cell epitopes and memory B cell epitopes by flow cytometry.

    Day 28 after second booster vaccination.

  • The immune response of breakthrough infection after heterologous boost third dose of COVID-19 vaccines after homologous prime-boost AZD1222 vaccination

    Immunogenicity studies include SARS-CoV-2 anti-spike IgG, the 50% neutralizing antibody titer (NT50), IFN - secreting T cells specific to whole spike protein, and Memory T cell epitopes and memory B cell epitopes by flow cytometry.

    Day 28 after breakthrough infection (after receiving third doses of any COVID-19 vaccine)

Secondary Outcomes (1)

  • The safety of heterologous boost third dose of COVID-19 vaccines

    From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 12 months

Study Arms (4)

Booster group 1 (BNT162b2 30ug)

EXPERIMENTAL

The participants in this group will receive BNT162b2 30ug as the booster dose.

Biological: BNT162b2

Booster group 2 (mRNA-1273 50ug)

EXPERIMENTAL

The participants in this group will receive mRNA-1273 50ug as the booster dose.

Biological: mRNA-1273

Booster group 3 (mRNA-1273 100ug)

EXPERIMENTAL

The participants in this group will receive mRNA-1273 100ug as the booster dose.

Biological: mRNA-1273

Booster group 4 (MVC-COV1901 15ug)

EXPERIMENTAL

The participants in this group will receive MCV COVID-19 vaccine 15ug as the booster dose.

Biological: MVC-COV1901

Interventions

BNT162b2BIOLOGICAL

BNT162b2 is an mRNA vaccine to prevent COVID-19 infection and is approved by the emergency use of authorization (EUA) by the Taiwan FDA.

Booster group 1 (BNT162b2 30ug)
mRNA-1273BIOLOGICAL

mRNA-1273 is an mRNA vaccine to prevent COVID-19 infection and is approved by the emergency use of authorization (EUA) by the Taiwan FDA.

Booster group 2 (mRNA-1273 50ug)Booster group 3 (mRNA-1273 100ug)
MVC-COV1901BIOLOGICAL

MCV COVID-19 vaccine is a protein subunit vaccine containing S2P S-protein which passes the EUA by Taiwan FDA.

Booster group 4 (MVC-COV1901 15ug)

Eligibility Criteria

Age20 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Participant is willing to give written informed consent for participation in the trial.
  • Participants should receive 2 doses of the AZD1222. Evidence of this will be gathered from medical history and/or medical records including the COVID-19 vaccine registration yellow card.

You may not qualify if:

  • The participant may not enter the trial if ANY of the following apply:
  • Fever or evidence of upper respiratory tract infections
  • Confirmed COVID-19 cases (PCR-confirmed infection or detectable anti-nucleocapsid protein IgG)
  • History of anaphylaxis, severe allergic disease, or reactions likely to be exacerbated by any component of study vaccines (e.g. hypersensitivity to the active substance or any of the listed ingredients of any study vaccine).
  • Malignancy requiring receipt of immunosuppressive chemotherapy or radiotherapy for treatment of solid organ cancer/hematological malignancy within the 6 months prior to enrollment.
  • Bleeding disorder (e.g. factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following intramuscular injections or venipuncture.
  • Has received vaccines other than COVID-19 vaccine within one month
  • Pregnancy or willingness/intention to become pregnant within 3 months post booster vaccine
  • Aged \< 20 years or unable to sign the informed consent
  • Any other significant disease, disorder, or finding which may significantly increase the risk to the volunteer because of participation in the study, affect the ability of the volunteer to participate in the study, or impair interpretation of the study data or insufficient level of language to undertake all study requirements in the opinion of the Investigators.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Chang Gung Memorial Hospital

Taoyuan, 333, Taiwan

Location

Related Publications (4)

  • Hillus D, Schwarz T, Tober-Lau P, Vanshylla K, Hastor H, Thibeault C, Jentzsch S, Helbig ET, Lippert LJ, Tscheak P, Schmidt ML, Riege J, Solarek A, von Kalle C, Dang-Heine C, Gruell H, Kopankiewicz P, Suttorp N, Drosten C, Bias H, Seybold J; EICOV/COVIM Study Group; Klein F, Kurth F, Corman VM, Sander LE. Safety, reactogenicity, and immunogenicity of homologous and heterologous prime-boost immunisation with ChAdOx1 nCoV-19 and BNT162b2: a prospective cohort study. Lancet Respir Med. 2021 Nov;9(11):1255-1265. doi: 10.1016/S2213-2600(21)00357-X. Epub 2021 Aug 13.

    PMID: 34391547BACKGROUND
  • Liu X, Shaw RH, Stuart ASV, Greenland M, Aley PK, Andrews NJ, Cameron JC, Charlton S, Clutterbuck EA, Collins AM, Dinesh T, England A, Faust SN, Ferreira DM, Finn A, Green CA, Hallis B, Heath PT, Hill H, Lambe T, Lazarus R, Libri V, Long F, Mujadidi YF, Plested EL, Provstgaard-Morys S, Ramasamy MN, Ramsay M, Read RC, Robinson H, Singh N, Turner DPJ, Turner PJ, Walker LL, White R, Nguyen-Van-Tam JS, Snape MD; Com-COV Study Group. Safety and immunogenicity of heterologous versus homologous prime-boost schedules with an adenoviral vectored and mRNA COVID-19 vaccine (Com-COV): a single-blind, randomised, non-inferiority trial. Lancet. 2021 Sep 4;398(10303):856-869. doi: 10.1016/S0140-6736(21)01694-9. Epub 2021 Aug 6.

    PMID: 34370971BACKGROUND
  • Normark J, Vikstrom L, Gwon YD, Persson IL, Edin A, Bjorsell T, Dernstedt A, Christ W, Tevell S, Evander M, Klingstrom J, Ahlm C, Forsell M. Heterologous ChAdOx1 nCoV-19 and mRNA-1273 Vaccination. N Engl J Med. 2021 Sep 9;385(11):1049-1051. doi: 10.1056/NEJMc2110716. Epub 2021 Jul 14. No abstract available.

    PMID: 34260850BACKGROUND
  • Chuang CH, Huang CG, Huang CT, Chen YC, Kung YA, Chen CJ, Chuang TC, Liu CC, Huang PW, Yang SL, Gu PW, Shih SR, Chiu CH. Titers and breadth of neutralizing antibodies against SARS-CoV-2 variants after heterologous booster vaccination in health care workers primed with two doses of ChAdOx1 nCov-19: A single-blinded, randomized clinical trial. J Clin Virol. 2022 Dec;157:105328. doi: 10.1016/j.jcv.2022.105328. Epub 2022 Nov 12.

MeSH Terms

Conditions

COVID-19Breakthrough Infections

Interventions

BNT162 Vaccine2019-nCoV Vaccine mRNA-1273MVC-COV1901 vaccine

Condition Hierarchy (Ancestors)

Pneumonia, ViralPneumoniaRespiratory Tract InfectionsInfectionsVirus DiseasesCoronavirus InfectionsCoronaviridae InfectionsNidovirales InfectionsRNA Virus InfectionsLung DiseasesRespiratory Tract DiseasesDisease AttributesPathologic ProcessesPathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

mRNA VaccinesNucleic Acid-Based VaccinesVaccines, SyntheticRecombinant ProteinsProteinsAmino Acids, Peptides, and ProteinsVaccinesBiological ProductsComplex MixturesCOVID-19 VaccinesViral VaccinesAntigensBiological Factors

Study Officials

  • Cheng-Hsun Chiu, MD, PhD

    Chang Gung Memorial Hospital

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
phase 1
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
PARTICIPANT
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

November 11, 2021

First Posted

November 24, 2021

Study Start

November 30, 2021

Primary Completion

April 1, 2023

Study Completion

April 1, 2023

Last Updated

July 25, 2022

Record last verified: 2021-11

Data Sharing

IPD Sharing
Will not share

Locations