In a recent study posted to the bioRxiv* preprint server, researchers investigated the waning of protective immunity conferred by prior infection by Omicron sub-variants BA.1, BA.2 towards its most ...

In a recent study posted in the Research Square* preprint server, which is under consideration at a Nature Portfolio Journal, researchers evaluated the pathogenicity and replication potential of ...

The COVID Omicron sub-variant BA.2, informally dubbed the "Stealth Omicron" variant, is able to reinfect people who have already had Omicron, a new study suggests. BA.2 has been under close ...

COPENHAGEN, Jan 31 (Reuters) - The BA.2 subvariant of the Omicron coronavirus variant, which has quickly taken over in Denmark, is more transmissible than the more common BA.1 and more able to infect ...

Just because you had an omicron variant of COVID-19 in the last few months doesn't mean you won't get infected with the newly dominant BA.5 subvariant, according to a new study of what's been called ...

In this stock photo, a healthcare worker fills a syringe with the Pfizer COVID-19 vaccine at Jackson Memorial Hospital, Oct. 5, 2021, in Miami. Lynne Sladky AP The omicron BA.5 subvariant, which is ...

A recent study analyzed mRNA COVID vaccine effectiveness for immunocompromised adults during Omicron BA.4 and BA.5 predominance. The large, geographically diverse study confirms that overall ...

In mice, the BA.5-targeting bivalent booster now rolling out nationwide did an equally good job at thwarting the BA.5 omicron subvariant as the bivalent booster targeting its predecessor, BA.1, which ...