Before immunization was widely available in the United States, there were between three and four million cases of measles each year. After immunization ...

A new Covid-19 variant, officially known as NB.1.8.1 and nicknamed Nimbus, is now the most common strain in the US, according to the US Centers for Disease Control and Prevention.

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

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

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