Fact Check: Is Trump’s claim the combined MMR vaccine could be lethal true?
WASHINGTON, DC: President Donald Trump signed an executive order on childhood vaccines during a White House meeting on Monday, August 10.
As he announced the order, which calls on states to review childhood vaccine recommendations, Trump made several claims about vaccines and their alleged link to autism.
He also suggested that giving measles, mumps and rubella (MMR) vaccines separately would be safer and implied that the combined MMR vaccine could be lethal to children. Is that claim true?
Claim: Trump claimed that the combined MMR vaccine could be lethal to children
President Trump just signed an executive order dramatically scaling back the childhood vaccine schedule.
— MAHA Action (@MAHA_Action) August 10, 2026
It spreads shots across more visits and removes vaccines children do not need from universal recommendations.
“Effective immediately, my administration is recognizing gold… pic.twitter.com/Oxt57S5jQX
Trump signed an executive order aimed at changing childhood vaccination policies in the US.
The order called for states to review their vaccine requirements and sought to reduce the number of vaccines recommended for children.
It also called for the MMR vaccine to be given as three separate shots, preferably during separate medical visits. Earlier efforts by the administration to change the vaccine schedule were blocked in court.
While signing the order, Trump said, “We want it in three separate vaccinations given at separate times,” referring to the MMR vaccine.
He added, “Together, there could be a possibility they’re quite lethal. And separately, it looks like they are not at all lethal, but just very effective.”
“It’s inconvenient, it’s five stops,” he said later, referring to multiple trips to the pediatrician. “But it’s something that I think will have a huge impact on autism.”
“The worst thing that would happen would be nothing happens. We’re not going to lose anything,” Trump said of splitting up the MMR vaccine. “At the same time, we could gain tremendously. We could save hundreds of thousands of lives, millions of lives.”
Fact Check: False, no evidence to support the claim
The claim is false. Doctors and years of evidence show that the combined MMR vaccine is safe and effective in protecting children from measles, mumps and rubella.
Doctors also point out that separate measles, mumps and rubella vaccines are not available in the United States.
“I’m concerned about an unintended consequence of people under-vaccinating because of fear that giving a single dose of the MMR is going to put their child at risk when there’s no evidence to suggest that’s the case,” said Dr Aaron Milstone, pediatric director of infection prevention at Johns Hopkins Health System and a fellow with the American Academy of Pediatrics.
“There are many, many, many years of scientific data highlighting the safety of vaccines in children.”
According to the CDC, most people who receive the MMR vaccine do not experience serious adverse reactions.
The CDC also says that getting the MMR vaccine is much safer than getting measles, mumps, or rubella. The vaccine protects against these illnesses and their potential complications.
The most serious risks linked to the vaccine include febrile seizures and severe allergic reactions. The CDC describes these reactions as "extremely rare."
