Health and Human Services Secretary Robert F. Kennedy Jr. said the measles vaccine is "leaky" because its effectiveness wanes over time, something medical experts dispute. Kennedy, a vaccine ...

The parents of a young girl who died after contracting measles last month in West Texas are speaking out about their position on the MMR vaccine. The child, age 6, died on Feb. 26 after being ...

Kennedy Jr., a vaccine skeptic, said in an interview Tuesday that he encourages people to get vaccinated against measles after an outbreak has killed at least three people in the U.S. − the ...