The emergence and rapid spread of SARS-CoV-2 variants may affect vaccine efficacy
substantially. The Omicron variant termed BA. 2, which differs substantially from BA. 1 based …

The emergence and rapid spread of SARS-CoV-2 variants may impact vaccine efficacy
significantly. The Omicron variant termed BA. 2, which differs genetically substantially from …

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 …

Large-scale vaccination campaigns have prevented countless hospitalizations and deaths
due to COVID-19. However, the emergence of SARS-CoV-2 variants that escape from …

The rapid emergence of SARS-CoV-2 variants challenges vaccination strategies. Here, we
collected 201 serum samples from persons with a single infection or multiple vaccine …

Since emergence of the initial SARS-CoV-2 BA. 1, BA. 2 and BA. 5 variants, Omicron has
diversified substantially. Antigenic characterization of these new variants is important to …

Emerging SARS-CoV-2 variants raise questions about escape from previous immunity. As
the population immunity to SARS-CoV-2 has become more complex due to prior infections …

Several studies have shown that SARS-CoV-2 BA. 1 omicron is an immune escape variant.
Meanwhile, however, omicron BA. 2 and BA. 5 became dominant in many countries and …

During the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic,
multiple variants escaping preexisting immunity emerged, causing reinfections of previously …

SARS coronavirus 2 (SARS-CoV-2), the causative agent of COVID-19, emerged in China in
December 2019. Vaccines developed were very effective initially, however, the virus has …