The emergence of SARS-CoV-2 variants of concern suggests viral adaptation to enhance
human-to-human transmission,. Although much effort has focused on the characterization of …

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 …

South Africa was among the first countries to detect the SARS-CoV-2 Omicron variant.
However, the size of its Omicron BA. 1 and BA. 2 subvariants (BA. 1/2) wave remains poorly …

Despite the remarkable efficacy of COVID-19 vaccines, waning immunity and the
emergence of SARS-CoV-2 variants such as Omicron represents a global health challenge …

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 …

Covid-19: Do vaccines work against omicron—and other questions answered | The BMJ Skip to
main content Intended for healthcare professionals Access provided by Google Indexer …

Omicron, the great escape artist Page 1 NATuRe RevIeWS | ImmunOlOgy 0123456789();:
immune functions seem to be markedly disrupted in macrophages from older mice. Additional …

Dear Editor, Since the emergence of severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2) in 2019, the virus has continued to evolve resulting in new waves of infection …

Following primary SARS-CoV-2 vaccination, whether boosters or breakthrough infections
provide greater protection against SARS-CoV-2 infection is incompletely understood. Here …

Genetically distinct viral variants of severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) have been recorded since January 2020. Over this time global vaccine programs …