Experts say XBB.1.5 is the most contagious SARS-CoV-2 variant currently in circulation. Here are common breakthrough symptoms ...

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

The latest COVID variant of concern, XBB.1.5, continues to rise but still ... Some 27.6% of new cases nationwide are linked to the variant, the CDC currently projects, with a prediction interval ...

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.

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

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

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