Diseases, Conditions, Syndromes

What you need to know about XBB.1.5, the latest omicron variant

Four weeks ago, the XBB.1.5 variant caused less than 10% of COVID-19 cases in the U.S. Now it causes more than 25% of them. Virologists including Andy Pekosz, a professor of Molecular Microbiology and Immunology, are paying ...

Diseases, Conditions, Syndromes

COVID-19 in 2022: A year-end wrap-up

Omicron overstayed its welcome. At-home COVID-19 testing was routine. The bivalent booster arrived.

Vaccination

EU backs new Omicron vaccines for first jabs

The EU's drug watchdog on Tuesday said two COVID vaccines targeting new types of the Omicron variant could now be used for people's first vaccinations, and not just for boosters.

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