The high effectiveness of the third dose of BNT162b2 in healthy adolescents against Omicron BA.1 has been reported in some studies, but immune respons...Read more

Background: Omicron subvariant BA.2 circulation is rapidly increasing globally. Aim: We evaluated the neutralising antibody response from vaccination ...Read more

A study by HKUMed and CU Medicine shows that a third dose of Comirnaty vaccine given to those who received two doses of either Comirnaty or CoronaVac ...Read more

We administered BNT162b2 as a third dose to 314 adults aged ≥30 years who had previously received 2 doses of inactivated vaccine. We collected blood s...Read more

Introduction: Two doses of inactivated SARS-CoV-2 vaccine CoronaVac cannot elicit high efficacy against symptomatic COVID-19, especially against the O...Read more

A joint study by HKUMed and CU Medicine reveals that Omicron variant significantly reduces the virus neutralisation ability of Pfizer BioNTech vaccine...Read more

A study by the LKS Faculty of Medicine, The University of Hong Kong (HKUMed) and the Faculty of Medicine, The Chinese University of Hong Kong (CU Medi...Read more

Background: Limited data exist on antibody responses to mixed vaccination strategies that involve inactivated coronavirus disease 2019 (COVID-19) vacc...Read more

Background: The duration of immunity in SARS-CoV-2 infected people remains unclear. Neutralizing antibody responses are the best available correlate o...Read more

Background: BA.2.12.1, BA.4 and BA.5 subvariants of SARS-CoV-2 variant-of-concern (VOC) Omicron (B.1.1.529) are spreading globally. They demonstrate h...Read more

The Omicron variant is rapidly becoming the dominant SARS-CoV-2 virus circulating globally. It is important to define reductions in virus neutralizing...Read more

Few trials have compared homologous and heterologous third doses of COVID-19 vaccination with inactivated vaccines and mRNA vaccines. The aim of this ...Read more