Pronounced immune escape by the SARS-CoV-2 Omicron variant has resulted in many
individuals possessing hybrid immunity, generated through a combination of vaccination …

ABSTRACT The novel SARS-CoV-2 Omicron variant may increase the risk of re-infection
and vaccine breakthrough infections as it possesses key mutations in the spike protein that …

We report the levels of neutralising antibodies against Wuhan, Delta and Omicron variants in
unimmunized infected (group 1), immunised and boosted (group 2) and infected immunised …

Dear Editor, As of December, 2021, more than 272 million people have been infected with
SARS-CoV-2. Multiple types of vaccines have been used to build herd immunity for the …

Background SARS-CoV-2 vaccines currently authorized for emergency use have been
highly successful in preventing infection and lessening disease severity. The vaccines …

The comparatively milder infections with the Omicron variant and higher levels of population
immunity have raised hopes for a weakening of the pandemic. We argue that the lower …

Population antibody response is thought to be important in selection of virus variants. We
report that SARS-CoV-2 infection elicits a population immune response that is mediated by a …

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 …

The recently emerged SARS-CoV-2 Omicron variant encodes 37 amino acid substitutions in
the spike protein, 15 of which are in the receptor-binding domain (RBD), thereby raising …

Based on its genetic profile and preliminary in vitro and epidemiological data, the recently
emerged SARS-CoV-2 Omicron variant is predicted to evade immune responses to some …