Health and Human Services Secretary Robert F. Kennedy Jr. received strong pushback from his anti-vaccine base after he endorsed the measles, mumps, and rubella vaccine after a second child in Texas died from a measles infection. 

Kennedy, who has built his “Make America Healthy Again” movement partly on derision of the MMR vaccine, buried an endorsement of the vaccine in a lengthy social media post on Sunday afternoon, calling it the “most effective way to prevent the spread of measles.”