Diseases, Conditions, Syndromes

XBB.1.5, the most transmissible Covid subvariant yet

The Omicron subvariant XBB.1.5, the most transmissible COVID-19 subvariant so far, is spreading quickly across the United States and was predicted on Friday to become Europe's dominant strain in a matter of weeks.

Diseases, Conditions, Syndromes

Weak spot in COVID could guide vaccine advances

After three years of infections, lockdowns, and vaccinations, we know a lot about SARS-CoV-2, the virus that causes COVID-19—but we don't know everything. Like, why are some variants weaker than others? Why does the omicron ...

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