RFK Jr. and his "MAHA" movement's popularity appears to be at least in slight jeopardy with vaccine-skeptical supporters.

Robert F. Kennedy Jr. softened his image as a vaccine critic while seeking to become the nation’s health secretary.

RFK Jr. claims the measles vaccine effectiveness wanes at a rate of nearly 5% a year, an assertion medical experts dispute.

RFK Jr. voiced support for the MMR vaccine after a measles death, despite a long history of general vaccine skepticism.

“The most effective way to prevent the spread of measles is the MMR vaccine,” Kennedy, a vaccine skeptic, wrote at the end of ...

U.S. Health and Human Services Secretary Robert F. Kennedy Jr. visited Gaines County, Texas, to console the families whose ...

Health and Human Services Secretary Robert F. Kennedy Jr. this week made his strongest endorsement yet of the measles vaccine ...

Public health experts say the anti-vaccine views fronted by the HHS secretary are wrong and undermine trust in science. But a ...

A school-aged child died at a Texas hospital where they were receiving treatment for measles, marking the second death of a ...

Robert F. Kennedy Jr., the Health and Human Services Secretary, has spoken several times in April about plans to find the origins of autism.

The nation’s top public-health official has been promoting suspicions of the shot even as he offers comfort.

Robert F. Kennedy Jr. made a stop in Texas on Sunday to visit the family of a 6-year-old girl who died in February after ...