%0 Journal Article %A Kwok, Shirley LL %A Cheng, Samuel MS %A Leung, Jennifer NS %A Leung, Kathy %A Lee, Cheuk-Kwong %A Peiris, JS Malik %A Wu, Joseph T %T Waning antibody levels after COVID-19 vaccination with mRNA Comirnaty and inactivated CoronaVac vaccines in blood donors, Hong Kong, April 2020 to October 2021 %D 2022 %J Eurosurveillance %V 27 %N 2 %P 2101197 %R doi:https://doi.org/10.2807/1560-7917.ES.2022.27.2.2101197 %K COVID-19 %K vaccine %K BNT162b2 %K CoronaVac %K SARS-CoV-2 %K antibody %U https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.2.2101197