Acting CDC Director Calls on Manufacturers to Break MMR Vaccine Into Separate Shots

The shots would replace the measles, mumps, rubella combination vaccine, Jim O'Neill said.

Jim O'Neill (L) is sworn in by Health Secretary Robert F. Kennedy, Jr. as the deputy health secretary, in Washington on June 9, 2025. Amy Rossetti/Department of Health and Human Services via AP

A commonly used combination vaccine against measles should be replaced with separate shots, the acting director of the Centers for Disease Control and Prevention said on Oct. 6.

The MMR vaccine targets measles, mumps, and rubella.