Trump Signs Executive Order Overriding CDC Vaccine Schedule and Splitting MMR Shots

President Donald Trump signed an executive order on August 10, 2026, directing sweeping changes to the childhood vaccination schedule, including splitting the combined measles, mumps, and rubella (MMR) vaccine into three separate shots administered during different visits. The order also states that the administration will no longer recommend hepatitis B, Covid-19, and influenza shots for children. This action attempts to override the authority of the Centers for Disease Control and Prevention (CDC), which is the federal agency responsible for recommending vaccines, and follows earlier changes to CDC recommendations that were halted by a federal judge.