While COVID-19 transmission remains low in the US ... a lull in infection activity that suggests protective responses have ...

COVID-19 is remains a public health concern five years after the start of the pandemic. What to know about vaccines, variants ...

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: ...