Experts at the World Health Organization have named XBB.1.5 — also known as the "Kraken" strain — the most infectious version ...

Updated Covid boosters cut the infection risk from XBB.1.5 subvariant by nearly half, CDC finds The report provides the first ...

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.

The CDC has lowered its estimate of omicron subvariant XBB.1.5's prevalence in the U.S., now saying the highly transmissible strain accounts for about 28 percent of COVID-19 cases. The CDC first ...

The CDC has published real-world data showing the omicron booster cuts the risk of mid illness from the fast spreading XBB ...

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 ...

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 ...

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

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