Novel SARS-CoV-2 omicron variants, including BM. 1.1. 1, BQ. 1.1, and XBB. 1, continue to
emerge at an unprecedented rate, evading preexisting immunity from vaccination and …

This study estimates the effectiveness of previous infection with SARS-CoV-2 in preventing
reinfection with Omicron BA. 4/BA. 5 subvariants using a test-negative, case–control study …

Omicron variant strains encode large numbers of changes in the spike protein compared to
historical SARS-CoV-2 isolates. Although in vitro studies have suggested that several …

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) omicron
variant, designated as a variant of concern by the World Health Organization, carries …

SARS-CoV-2 infections have surged across the globe in recent months, concomitant with
considerable viral evolution,–. Extensive mutations in the spike protein may threaten the …

The recent emergence of SARS-CoV-2 Omicron (B. 1.1. 529 lineage) variants possessing
numerous mutations has raised concerns of decreased effectiveness of current vaccines …

Abstract SARS coronavirus 2 (SARS-CoV-2) continues to evolve and new variants emerge.
Using nationwide Danish data, we estimate the transmission dynamics of SARS-CoV-2 …

Abstract The SARS-CoV-2 Omicron variant harbors more than 30 mutations in its spike (S)
protein. Circulating Omicron subvariants, particularly BA5 and other variants of concern …

The highly mutated and transmissible Omicron (BA. 1) and its more contagious lineage BA.
2 have provoked serious concerns over their decreased sensitivity to the current COVID-19 …

The SARS-CoV-2 omicron (B. 1.1. 529) variant has rapidly become globally dominant,
displacing the previously dominant delta (B1. 617.2) variant. The viral spike (S) protein is the …