Former President Donald Trump signed an executive order on August 10, 2026, that recommends changes to the U.S. childhood vaccine schedule. The order suggests increased research and flexibility in vaccine recommendations, specifically proposing that the measles, mumps, and rubella (MMR) vaccine be administered as three separate shots instead of one.

The directive, signed in the Oval Office of the White House, was observed by Secretary of Health and Human Services Robert F. Kennedy Jr. The executive order focuses on establishing a revised approach to vaccine administration for children, aiming for greater adaptability in public health recommendations.