The fast-spreading BA.5 subvariant of Omicron and its close relative BA.4 now make up around 95% of COVID-19 cases in the U.S., according to estimates published Tuesday by the Centers for Disease ...

The U.S. Centers for Disease Control and Prevention announced Thursday it is tracking a recently discovered COVID-19 strain, BA.2.86, after a case of the highly mutated variant was discovered in ...

The omicron variant of the coronavirus has been dominant in the U.S. since December, but the version of omicron that drove the major infection surge during the winter now accounts for less than 2 ...

After COVID-19 cases in the U.S. came down from their January peak, those numbers are climbing yet again. This time experts say the increase is likely due to a new variant called BA.2, a subvariant of ...

Omicron coronavirus subvariants BA.4 and BA.5 are now accounting for an estimated 35 percent of US cases, according to the Centers for Disease Control and Prevention. The subvariants are on a course ...

BA.5 is still classified as an omicron variant but has new mutations different from BA.1 and BA.2 The first cases appeared in the Northeast, then started spreading to the South, Midwest and West Can ...