Since the start of the COVID-19 pandemic, numerous variants of SARS-CoV-2 have been
reported worldwide. The advent of variants of concern (VOCs) raises severe concerns amid …

The Omicron variant was first detected in October 2021, which evolved from the original
SARS‐CoV‐2 strain and was found to possess many mutations. Immune evasion was one of …

The highly mutated SARS-CoV-2 Omicron (B. 1.1. 529) variant has been shown to evade a
substantial fraction of neutralizing antibody responses elicited by current vaccines that …

Abstract Background The Ad26. COV2. S vaccine was highly effective against severe–
critical coronavirus disease 2019 (Covid-19), hospitalization, and death in the primary phase …

Vaccine effectiveness is lower and wanes faster against infection and symptomatic disease
caused by the omicron variant of SARS-CoV-2 than was observed with previous variants …

Summary Background The SARS-CoV-2 Omicron variant became a global concern due to
its rapid spread and displacement of the dominant Delta variant. We hypothesized that part …

The rapid spread of the SARS-CoV-2 Omicron (B. 1.1. 529) variant, including in highly
vaccinated populations, has raised important questions about the efficacy of current …

Importance Antibody responses elicited by current messenger RNA (mRNA) COVID-19
vaccines decline rapidly and require repeated boosting. Objective To evaluate the …

The development and deployment of vaccines against COVID-19 demonstrated major
successes in providing immunity and preventing severe disease and death. Yet SARS-CoV …

Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome
coronavirus-2 (SARS-CoV-2), is a threat to the health of the global population. As the result …