Kennedy, a leading antivaccine activist, removed the COVID-19 vaccine from the CDC's recommended list for healthy children and pregnant women.

Single doses of 150 milligrams (mg), 300 mg, and 450 mg provided 58%, 61%, and 76% protection from symptomatic flu, ...

Measles cases in the U.S. reach a 33-year high with 1,300 infections across 38 states, mostly in unvaccinated individuals, ...