Enhanced transmissibility, infectivity, and immune resistance of the SARS-CoV-2 omicron XBB.1.5 variant

In late 2022, the SARS-CoV-2 omicron BQ.1 and XBB lineages, characterised by amino acid substitutions in the spike (S) protein that increase viral fitness, had become predominant in the western (BQ.1) and eastern (XBB) hemispheres.

  • Ito J
  • Suzuki R
  • Uriu K
  • et al.
Convergent evolution of the SARS-CoV-2 Omicron subvariants leading to the emergence of BQ.1·1 variant.