Covid-19 Vaccines — Immunity, Variants, Boosters | NEJM Skip to main content NEJM Group
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Immunological memory is the basis of protective immunity provided by vaccines and
previous infections. Immunological memory can develop from multiple branches of the …

Abstract The SARS-CoV-2 Omicron variant (B. 1.1. 529) has multiple spike protein
mutations, that contribute to viral escape from antibody neutralization,,–and reduce vaccine …

Recent surveillance has revealed the emergence of the SARS-CoV-2 Omicron variant (BA.
1/B. 1.1. 529) harboring up to 36 mutations in spike protein, the target of neutralizing …

Over the past several decades, messenger RNA (mRNA) vaccines have progressed from a
scepticism-inducing idea to clinical reality. In 2020, the COVID-19 pandemic catalysed the …

INTRODUCTION Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) mRNA
vaccines are highly effective at preventing infection and especially severe disease …

ABSTRACT Background SARS-CoV-2 mRNA vaccines have proven high efficacy, however,
limited data exists on the duration of immune responses and their relation to age and side …

Objective To compare the efficacy of covid-19 vaccines between immunocompromised and
immunocompetent people. Design Systematic review and meta-analysis. Data sources …

Background Vaccines are critical cost-effective tools to control the coronavirus disease 2019
(COVID-19) pandemic. However, the emergence of variants of the severe acute respiratory …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a new beta coronavirus
that emerged at the end of 2019 in the Hubei province of China. SARS-CoV-2 causes …