In late 2020, after circulating for almost a year in the human population, severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2) exhibited a major step change in its …

Abstract Coronavirus Disease 2019 (COVID-19) has been the most severe public health
challenge in this century. Two years after its emergence, the rapid development and …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron sublineages BA.
2.12. 1, BA. 4 and BA. 5 exhibit higher transmissibility than the BA. 2 lineage 1. The receptor …

The Omicron, or Pango lineage B. 1.1. 529, variant of severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) carries multiple spike mutations with high transmissibility and …

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 …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron (B. 1.1. 529)
variant is highly transmissible with potential immune escape. We conducted a test-negative …

Objectives To characterize the clinical severity of covid-19 associated with the alpha, delta,
and omicron SARS-CoV-2 variants among adults admitted to hospital and to compare the …

The emergence of the SARS-CoV-2 variant of concern Omicron (Pango lineage B. 1.1. 529),
first identified in Botswana and South Africa, may compromise vaccine effectiveness and …

The emergence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Omicron (B. 1.1. 529) variant of concern (VOC) has destabilized global efforts to control the …

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 …