NB.1.8.1 — a new COVID-19 variant tied to a surge in China — now accounts for around 37% of cases in the U.S., according to variant proportion estimates from the CDC. Four notes: ...

Vaccine makers will have to run large new trials before updated shots can be approved for everyone who is not at a higher-than-average risk.

New research suggests a link between some weight loss drugs and potentially blinding eye diseases. That risk is especially high for older adults. A recent study found that older adults with diabetes ...