Soon after the emergence and global spread of the SARS-CoV-2 Omicron lineage BA. 1,
another Omicron lineage, BA. 2, began outcompeting BA. 1. The results of statistical analysis …

Soon after the emergence and global spread of a new severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) Omicron lineage, BA. 1 (ref,), another Omicron lineage, BA. 2 …

Summary Background The Omicron BA. 2 sublineage has replaced BA. 1 worldwide and
has comparable levels of immune evasion to BA. 1. These observations suggest that the …

After the global spread of the SARS-CoV-2 Omicron BA. 2, some BA. 2 subvariants,
including BA. 2.9. 1, BA. 2.11, BA. 2.12. 1, BA. 4, and BA. 5, emerged in multiple countries …

Summary The SARS-CoV-2 Omicron BA. 2.75 variant emerged in May 2022. BA. 2.75 is a
BA. 2 descendant but is phylogenetically distinct from BA. 5, the currently predominant BA. 2 …

The unremitting emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-
2) variants necessitates ongoing control measures. Given its rapid spread, the new Omicron …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron BA. 2 was a
dominant circulating SARS-CoV-2 variant worldwide. Recent reports hint that BA. 2 is …

In late 2023, several SARS-CoV-2 XBB descendants, notably EG. 5.1, were predominant
worldwide. However, a distinct SARS-CoV-2 lineage, the BA. 2.86 variant, also emerged …

The recent emergence of SARS-CoV-2 Omicron variants possessing large numbers of
mutations has raised concerns of decreased effectiveness of current vaccines, therapeutic …

Abstract The Omicron SARS-CoV-2 has several distinct sublineages, among which
sublineage BA. 1 is responsible for the initial Omicron surge and is now being replaced by …