The mRNA vaccine Comirnaty and the inactivated vaccine CoronaVac are both available in
Hong Kong's COVID-19 vaccination programme. We observed waning antibody levels in …

Immune escape is observed with SARS-CoV-2 Omicron (Pango lineage B. 1.1. 529), the
predominant circulating strain worldwide. A booster dose was shown to restore immunity …

Background While different COVID-19 vaccines have been developed, there has been lack
of data on the efficacy comparison between mRNA and inactivated whole virus vaccine …

Objective: People with HIV (PWH) co-infected with severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) are at higher odds of severe diseases. Whereas the …

Following the spread of the SARS-CoV-2 coronavirus, an unprecedented burden has been
placed on health care systems, with health care workers (HCWs) being most at risk of …

Objectives This study aimed to investigate the safety of the inactivated COVID-19 vaccines in
early pregnant women in view of their adverse-effect profile and associated maternal-fetal …

COVID-19 has swept across the globe since 2019 and repeated waves of infection have
been caused by different variants of the original SARS-CoV-2 (wild type), with the Omicron …

Objective: We constructed two DNA vaccines containing the receptor-binding domain (RBD)
genes of multiple SARS-CoV-2 variants and used them in combination with inactivated …

Background The pandemic coronavirus disease 2019 (COVID-19) is a major global public
health concern and several protective vaccines, or preventive/therapeutic approaches have …

At the time of writing, the “fifth wave” of coronavirus disease 2019 (COVID-19) in Hong Kong
that started to surge since late January 2022 is receding. The fifth wave has been the worst …