On Monday, August 11th, 2026, US President Donald Trump signed an executive order aimed at overhauling childhood vaccine policy. The order calls for fewer recommended immunizations for children and advocates administering vaccines at separate medical visits whenever possible. Notably, it directs that the combined measles, mumps, and rubella vaccine (MMR) be split into three single-disease shots.

Trump described the move as a "major victory for parents rights, religious and constitutional rights, and for the gold standard science." The order also states that the federal government will support 11 core childhood vaccinations and encourages states and territories to review vaccine requirements for school enrollment. However, most school vaccine mandates are set by individual states, limiting federal influence.

The executive order has faced pushback from medical professionals and vaccine manufacturers. Vaccine maker Merck stated there is no published scientific evidence supporting any benefit from splitting the MMR vaccine. Aaron M., a representative from the vaccine community, said, "We're advising that you continue to give children a vaccine that has decades of safety data," and warned that splitting the MMR vaccine "will mean children have to get more shots to get the same protection, not fewer shots."

New York City Health Commissioner Alister Martin criticized the order, saying it was based "in politics and conspiracy theories." A medical doctor also commented, "This executive order is wrong. The president does not have the expertise to make these changes."

Earlier in the year, Kennedy Jr. had sought to remove vaccines against six of 17 diseases from the childhood schedule, indicating ongoing debates over vaccine policies.

Sources