The National Institute of Virology (NIV), Pune, announced on Wednesday that it has successfully sequenced and isolated four new sub-variants of the Omicron coronavirus variant. These sub-variants are ...

New Delhi: India’s active Covid-19 caseload fell to 5,976 on Friday, down from 6,483 cases a day earlier, even as new Omicron sub-variants continue to drive infections. The country reported three ...

In a recent study in Nature Microbiology, researchers compared severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variant of concern (VOC) replication in human cell lines and primary ...

In Denmark, BA.2 is surpassing the BA.1 subtype, the most common cause of new COVID-19 cases. It's not yet clear whether BA.2 is more severe or contagious than BA.1. Health officials and scientists ...

Panel A shows spike protein sequences for the omicron BA.2, BA.2.75.2, XBB.1, BA.5, BF.7, and BQ.1.1 subvariants; mutations as compared with the WA1/2020 spike protein are shown. Mutations as compared ...