KVIG Informative

The president signed an executive order this week rewriting how American children get vaccinated against measles, mumps and rubella — except the standalone shots it calls for aren’t licensed, aren’t manufactured, and according to pediatricians, aren’t backed by any evidence they’d help.

President Trump signed an executive order August 10 directing Health and Human Services Secretary Robert F. Kennedy Jr. and the department’s Task Force on Safer Childhood Vaccines to make individual, single-disease vaccines available to families, starting with the combined measles, mumps and rubella shot, and to reassess the timing and sequencing of other childhood immunizations.

The order recommends spacing vaccines across separate medical visits rather than combining doses, and identifies 11 diseases — down from 18 currently recommended — that all children should be vaccinated against, according to a White House fact sheet.

Standalone measles, mumps and rubella vaccines are not currently licensed or manufactured in the United States. The MMR vaccine has been administered as a combined shot since 1971, and developing, testing and licensing separate versions would likely take years, according to the Center for Infectious Disease Research and Policy at the University of Minnesota.

Merck, which manufactures the current combined MMR vaccine, said in a statement that its product is supported by decades of clinical and real-world evidence, and that separating the shots could result in delayed or missed immunizations.

American Academy of Pediatrics President Andrew Racine said the order does nothing to support families of children with autism or advance understanding of the condition, and that spreading vaccines across more doctor visits could make it harder for parents to get their children fully vaccinated. A 2024 CDC web page, still online as of this week, states there is no published scientific evidence that separating the combined MMR vaccine into individual shots provides any benefit.

At the signing, Trump and Kennedy repeated claims linking vaccines to autism that public health researchers have extensively studied and found no evidence to support. The executive order itself does not mention autism.

The order is a recommendation, not a mandate — it does not change school vaccination requirements or federal guidance already in effect, and a related effort to reshape the childhood vaccine schedule was blocked by a federal judge in March. Pediatricians say the immediate risk isn’t the paperwork; it’s the message the order sends to parents already unsure whether to trust the schedule their doctor gives them.