The CDC study provides the first estimate of the omicron shots’ real-world effectiveness against the XBB family of ...

CDC data shows the bivalent COVID vaccines protect against the omicron variant known as XBB and its subvariant XBB.1.5.

XBB.1.5 is a spinoff of XBB, a subvariant of omicron that health officials worldwide have been warning about since the fall.

XBB.1.5's prevalence remains highest in ... is growing in proportion quickly," Barbara Mahon, head of the CDC's proposed Coronavirus and Other Respiratory Viruses Division, told CBS News last ...

The updated Covid boosters reduce the risk of Covid infection from the predominant omicron subvariant by nearly half, ...

New data from the Centers for Disease Control and Prevention (CDC) indicates that the updated bivalent COVID-19 vaccines do ...

While the omicron subvariant is quickly becoming dominant in the U.S., CIDRAP notes that a feared-for bump in cases caused by people gathering over the holidays hasn’t yet been seen in the ...

The strain, known XBB.1.5, accounts for about 41% of confirmed COVID cases across the nation, the data shows. The mutation has gained considerable traction over the past week, the CDC noted ...

A booster dose provided at least 3 months of protection against symptomatic XBB and XBB.1.5 infections in seniors who had ...

Early data published by the CDC Wednesday offers evidence that Moderna and Pfizer’s updated bivalent booster shots — tailored last summer for the omicron subvariants BA.4 and BA.5 omicron ...