President Trump signed an executive action on Aug. 10, 2026, that lowers the number of recommended childhood vaccine doses to 11. The action is part of a broader push by the Trump administration, led by Health and Human Services Secretary Robert F. Kennedy Jr., to reshape pediatric immunization in the United States. Kennedy, who has long criticized vaccines, stood next to Trump in the Oval Office when the president signed the order.
The order names parental authority, disability accommodations, religious objections, and medical reasons as protected exemption categories. It also tells the Justice Department to review whether states are honoring exemptions from vaccine mandates.
At a Monday briefing, Trump said the new recommendation puts the U.S. more in line with other advanced nations. "This updated recommendation finally aligns the United States with other advanced and developed nations around the world," he said. "More importantly, it aligns us with common sense and knowledge."
Trump has repeatedly claimed that more childhood vaccinations are connected to higher autism diagnosis rates. Decades of research have found no connection between vaccines and autism.
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"The MMR we want to have separate visits, separate times. The vaccine being broken into three separate single doses and vaccines being administered in separate visits," Trump said.
The directive also targets the related MMRV vaccine, which combines MMR with varicella to protect against chickenpox.
Kennedy has leveraged his HHS role to demand closer examination of vaccine ingredients and immunization schedules. Federal enforcement agencies are given a role in settling exemption disputes, a sign that the administration wants state and local rules to make room for more parents who skip or postpone shots.
Normally, the CDC's Advisory Committee on Immunization Practices decides which vaccines are recommended and at what ages children should get them. States set their own requirements for school attendance. The order leaves that process intact, but it pushes federal agencies toward a shorter schedule and asks them to probe states that fail to respect the exemption categories Trump listed.
The order takes a side in a long-running national debate over vaccine requirements. Still, Trump is moving forward with a smaller schedule and a split MMR plan. The autism claim he repeats is contradicted by decades of evidence, and splitting MMR would alter how pediatricians deliver protection against measles, mumps, and rubella. Officials have not yet released details on how the reduced schedule would be put into practice.
Because state governments set school vaccine requirements, the order will not immediately change what children need to enroll. It does, however, signal that the administration wants federal agencies to move toward a shorter schedule and to scrutinize states that do not accommodate the exemption categories. Kennedy's HHS has already been reviewing vaccine ingredients and schedules, and this directive gives that effort more force.
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