The Infectious Disease Society of America says there have been “no deaths related to the measles, mumps and rubella vaccine in healthy individuals.” (Since the 1970s, the measles vaccine has been given in a combination shot with mumps and rubella to minimize the number of injections kids get.)

Health Secretary Robert F. Kennedy Jr. spread a confusing message about the measles vaccine during an interview on Fox News.

Experts say vitamin A can mitigate measles but does not protect those who are unvaccinated from getting the disease, and RFK Jr. says immunization is a "freedom of choice."