With the constantly mutating of SARS-CoV-2 and the emergence of Variants of Concern
(VOC), the implementation of vaccination is critically important. Existing SARS-CoV-2 …

Most COVID-19 vaccines are designed to elicit immune responses, ideally neutralizing
antibodies (NAbs), against the SARS-CoV-2 spike protein. Several vaccines, including …

Immune imprinting describes how the first exposure to a virus shapes immunological
outcomes of subsequent exposures to antigenically related strains. Severe acute respiratory …

Background CoronaVac, an inactivated whole-virion SARS-CoV-2 vaccine, has been shown
to be well tolerated with a good safety profile in individuals aged 18 years and older in …

Importance Although effective vaccines against COVID-19 have been developed, additional
vaccines are still needed. Objective To evaluate the efficacy and adverse events of 2 …

The new SARS-CoV-2 virus is an RNA virus that belongs to the Coronaviridae family and
causes COVID-19 disease. The newly sequenced virus appears to originate in China and …

The pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) infection has resulted in an unprecedented setback …

Recent studies have reported the protective efficacy of both natural and vaccine-induced,,,,–
immunity against challenge with severe acute respiratory syndrome coronavirus 2 (SARS …

Background The ongoing COVID-19 pandemic warrants accelerated efforts to test vaccine
candidates. We aimed to assess the safety and immunogenicity of an inactivated severe …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in late
2019 in China and is the causative agent of the coronavirus disease 2019 (COVID-19) …