Trump orders reduction in US childhood vaccines, splits MMR shot into three amid medical backlash

President Donald Trump signed an executive order on Monday calling for a reduction in the number of recommended childhood vaccines from 18 to 11 and the separation of the combined measles, mumps and rubella (MMR) vaccine into three individual shots. The order also directs that childhood immunizations be administered at separate medical visits whenever feasible .
The changes align with long-standing goals of U.S. Health and Human Services Secretary Robert F. Kennedy Jr., an anti-vaccine activist, and advance a policy push he has championed since taking office . Trump claimed the revised schedule would give U.S. children "gold-standard protection" and align the country with peer nations that recommend fewer shots .
During an Oval Office signing event, Trump falsely suggested the MMR vaccine could be "quite lethal" when administered as a combined shot and likened the volume of vaccines to "a bottle of soda." He argued that spacing out immunizations would prevent children from being "injected with more vaccines than they could handle" . The administration indicated it would push states to rework their vaccine requirements to incorporate the new federal guidelines .
The order has drawn immediate criticism from medical experts and lawmakers. Republican Sen. Bill Cassidy, a doctor and chairman of the Senate health committee, stated on X that the president lacks the expertise to make such changes. "Vaccines are overwhelmingly safe. Vaccines are effective. Vaccines DO NOT cause autism," Cassidy wrote. He added that breaking up vaccines would require more shots to achieve the same protection, increasing hesitancy and reducing safety .
The Centers for Disease Control and Prevention has stated there is "no published scientific evidence" supporting the benefits of separating the MMR vaccine into individual shots. The agency notes a "very small risk" of febrile seizures and extremely rare serious allergic reactions but emphasizes that the MMR vaccine is safer than contracting measles, mumps or rubella . The American Academy of Pediatrics has also opposed the changes, warning that they could reduce immunization rates and leave children more vulnerable to disease .
Public health experts have noted that separate vaccines for measles, mumps and rubella do not currently exist, and developing them would require clinical trials and regulatory approval. The order comes as measles cases in 2026 have already surpassed last year’s total .
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![Trump signs executive order to split up MMR vaccine President Trump issued an executive order Monday calling for fewer childhood vaccinations, splitting the childhood MMR vaccine into three shots and delivering vaccines at separate medical visits.Why it matters: Controversial vaccine policy changes appear to be roaring back ahead of the midterms.The executive order states that "the combined MMR vaccine should be administered in three separate single-disease shots once such products are domestically available and that, to the maximum extent feasible, all childhood immunizations should be administered at separate medical visits."The big picture: Health Secretary Robert F. Kennedy Jr.s handpicked vaccine advisers last fall called for splitting up the MMR shot and overhauling a central component of childhood immunizations.But the White House urged Kennedy to back off of such contentious policymaking earlier this year. And yet, President Trump has recently questioned Kennedy about the lack of momentum on childhood vaccine policy, per the Wall Street Journal, signaling his continued strong personal interest in the topic. What hes saying: "You have the MMR. We want it in three separate vaccinations, given at separate times," Trump said at an Oval Office signing event. He suggested the MMR vaccine could be "quite lethal" when administered all at once, and likened the volume to "a bottle of soda."Reality check: The CDC says theres "no published scientific evidence [that] shows any benefit in separating the combination MMR vaccine into three individual shots."It says there can be a "very small risk" of febrile seizures and extremely rare cases of serious allergic reactions, but that getting the MMR vaccine "is much safer than getting measles, mumps, or rubella."In addition, vaccine safety experts at CDC and the American Academy of Pediatrics agree the MMR shot is not responsible for recent increases in autism diagnoses."Im a doctor. This executive order is wrong. The President does not have the expertise to make these changes," Sen. Bill Cassidy (R-La.), chairman of the Senate health committee, wrote on X."Breaking up vaccines will mean children have to get more shots to get the same protection, not fewer shots. It will increase hesitancy and make children less safe."Threat level: Public health experts said the move could make it more expensive and time-consuming for children to get vaccinated against measles, mumps and rubella at a time when measles cases for 2026 have already surpassed last years total. Its also not clear whether health insurers will cover the extra pediatrician visits that the White House is calling for.There currently are not separate vaccines for measles, mumps and rubella. Companies would have to do clinical trials to bring each through the approval process. Between the lines: Theres no evidence that the childhood vaccine schedule in place prior to Trumps second term poses any risk to childrens health, including by raising the risk for autism.Courts have frozen an administration attempt to pare the federal list of recommended childhood vaccines and otherwise limit who can obtain some shots. Vaccine supporters say splitting up the MMR shot by definition requires more doctor visits, raising the chance of missed visits and skipped immunizations. This story has been updated with Trumps comments on the executive order, Cassidys statement on X and additional reporting.](https://images.axios.com/z5xZKI79BsFl-f4UF2f1ah2Wu3A=/0x0:1920x1080/1366x768/2026/08/10/1786384470334.jpg)
