The first dominant SARS‐CoV‐2 Omicron variant BA. 1 harbours 35 mutations in its Spike
protein from the original SARS‐CoV‐2 variant that emerged late 2019. Soon after its …

Since the outbreak of the coronavirus disease 2019 (COVID-19) pandemic, there have been
a few variants of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), one of …

Background The safety and immunogenicity of the bivalent omicron-containing mRNA-
1273.214 booster vaccine are not known. Methods In this ongoing, phase 2–3 study, we …

The emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants
in the Omicron lineage has resulted in diminished Coronavirus Disease 2019 (COVID-19) …

Covid-19 Vaccines — Immunity, Variants, Boosters | NEJM Skip to main content NEJM Group
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Omicron Neutralization after Covid-19 Vaccination After two doses of mRNA vaccine, health
care workers had less viral neutralizing-antibody activity against the BA. 4/5 and BA. 2.12. 1 …

The recent emergence of the SARS-CoV-2 Omicron variant is raising concerns because of
its increased transmissibility and its numerous spike mutations, which have the potential to …

Immunological memory is the basis of protective immunity provided by vaccines and
previous infections. Immunological memory can develop from multiple branches of the …

Abstract Coronavirus disease 2019 (COVID‐19) is an ongoing pandemic, which affected
around 45 million confirmed cases of COVID‐19, including more than 6 million deaths …

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 …