COVID-19 vaccine research: A community-based longitudinal observational cohort study on the immunogenicity and duration of vaccine-induced immune responses to different COVID-19 vaccines (COVAR study)

This is a large-scale community-based research study on COVID-19 vaccine effectiveness in Hong Kong organised by the School of Public Health, the University of Hong Kong. We will track individuals who have received any COVID-19 vaccine for a period of 3 years (2021 – 2024), to comprehensively monitor the immediate reactions, immune protection, respiratory virus infections and other health conditions after COVID-19 vaccination.

For details, please refer to our study website.


這是一項在香港本地進行的有關2019冠狀病毒病(COVID-19)疫苗效用的大型社區研究計劃,由香港大學公共衞生學院主辦,追踪COVID-19疫苗接種者為期3年(2021 – 2024年),以全面監測接種COVID-19疫苗後的短期反應、免疫保護、呼吸道病毒感染及其他健康狀況。