Recruitment Target Reached | 招募人數達標

Thank you for your interest in participating. Our current recruitment target has been reached.


Combination of mRNA and inactivated COVID-19 vaccines: A prospective cohort study

Combination of mRNA (Comiranty) and inactivated (CoronaVac) COVID-19 vaccination might improve the vaccine immunogenicity and safety when compare to vaccination with two doses of the same type of vaccine.

This study by HKU Department of Medicine targets to recruit 150 adult subjects 18 years or above and randomise to receive a single dose of of Comirnaty followed by a single dose of CoronaVac, or two doses of Comirnaty or two doses of CoronaVac. Subjects will be follow-up and assessed for a total of 1 year for vaccine immunogenicity and safety.




Content | 研究內容

The aim of this study is to investigate the immunogenicity profile of people getting vaccinated.

Volunteers will be required to:



Venue | 研究地點

The research will be carried out at the Community Vaccination Centre in Ap Lei Chau Sports Centre.


Eligibility | 參與資格

A sincere invitation to healthy volunteers to participate in this clinical study.

Participants must meet the following criteria:


Enquiries | 聯絡研究團隊

If you have any further question about this study, please contact study nurse Miss Deborah Ho at HKU Department of Medicine: