700
Participants
Start Date
May 22, 2020
Primary Completion Date
August 18, 2025
Study Completion Date
February 17, 2026
third dose vaccination with CoronaVac vaccine
Healthy individuals with low antibody levels after 2 doses of CoronaVac vaccine to receive one additional dose of CoronaVac vaccine
third dose vaccination with BionTech vaccine
Healthy individuals with low antibody levels after 2 doses of CoronaVac vaccine to receive one additional dose of BionTech vaccine
Vaccination with Coronavac vaccine
Healthy individuals to receive Coronavac vaccine 2 doses, 21 days apart
Vaccination with BionTech Vaccine
Healthy individuals to receive BionTech vaccine 2 doses, 21 days apart
RECRUITING
Prince of Wales Hospital, Hong Kong
The University of Hong Kong
OTHER
Health and Medical Research Fund
OTHER_GOV
Chinese University of Hong Kong
OTHER