President Donald Trump has signed an executive order aimed at reshaping long-standing federal recommendations for childhood vaccines while pressing states to reconsider vaccination requirements for students.
The directive sorts childhood immunizations into three separate categories, instructs federal agencies to promote the revised guidance and calls on state leaders to revisit school vaccine mandates.
Titled the “Gold Standard Childhood Vaccine Recommendations,” the order also advances one of Trump’s long-held vaccine priorities: separating the combined measles, mumps and rubella vaccine into individual shots, despite medical consensus rejecting claims of a link between the MMR vaccine and autism.
It further recommends that childhood vaccines be given during separate doctor visits “to the maximum extent feasible.”
Public health specialists have repeatedly emphasized that the combined MMR vaccine is safe and highly effective, warning that spacing out the shots could prolong the period in which children remain at risk for serious infections.
The order notes that previous vaccine-related actions by the administration have been “delayed due to litigation” and directs federal agencies to push the new recommendations “to the fullest extent allowable by law.”
Still, the measure appears mostly symbolic. Authority over school vaccine requirements rests with the states, not Washington. Any changes to the federal childhood immunization schedule would also have to move through the CDC’s formal process and its vaccine advisory committee.
The order arrives amid a sharp rise in measles infections. According to the CDC, 2,465 cases have been reported across 47 states so far in 2026, already exceeding last year’s total. Unvaccinated people account for 93 percent of cases, while childhood vaccination rates have fallen to 92.5 percent, leaving nearly 300,000 children unprotected.
President Trump signed an executive order to revamp federal childhood vaccine guidance and encourage states to reconsider school vaccine requirements
The MMR vaccine has been proven safe and effective through decades of research. It is 97 percent effective at preventing infection, adverse effects are rare and there is no scientific evidence that separating the vaccines provides any medical benefit.
The CDC’s current MMR dosing schedule is two doses: the first at 12 to 15 months of age and the second at four to six years old, before starting school.
Under the current CDC schedule, vaccines generally are spread across multiple doctor visits in a child’s first year and a half at two, four, six, 12 and 15 months.
Rather than getting all at once, children receive a few shots at each visit designed to protect them as early as possible. Medical experts say this schedule is carefully studied and proven safe.
The executive order does not provide a specific updated schedule with ages and timing. It directs agencies to review the recommendations and adjust the schedule ‘as appropriate.’
The latest order builds on a change announced in January, when the Department of Health and Human Services slashed the number of vaccines recommended for all children from 17 to 11.
Under the administration’s proposed vaccine guidance overhaul, which is advisory and cannot be mandated, vaccines for 11 diseases including measles, mumps, polio and whooping cough would be recommended for all children.
Vaccines for hepatitis A and B and meningococcal disease would be recommended only for high-risk groups or through shared decision-making between parents and doctors. Flu and Covid shots would also fall into the shared decision-making category.
Children receive shots at each visit on a schedule experts say is proven safe. The order doesn’t provide a new schedule. It directs agencies to review and adjust it
Trump said Monday: ‘Together, there could be a possibility [the MMR] is quite lethal and separately it looks like they are not at all lethal but very effective.
‘For example, at one year, you should have five separate visits for vaccines rather than getting them all in the same day.’
‘And I saw this early on and I’ve seen proof of it where they have a vaccination thing, it looks like the size of a bottle of soda poured into a little child’s body and bad things happen in many cases.’
There is no evidence that the combined MMR vaccine is lethal. Serious side effects are extremely rare and the risks of the vaccine are vastly outweighed by the risks of the diseases it prevents.
Before the measles vaccine, about 500 children died from measles every year in the US. According to the CDC, about 1 to 3 out of every 1,000 children infected with measles will die from complications, while there have been no deaths shown to be related to the MMR vaccine in healthy people.
Doses of live viruses like those in the MMR vaccine are tiny — a fraction of a teaspoon.
Many states now follow guidance from the American Academy of Pediatrics and other major medical groups, which recommend vaccines based on a child’s immune system development and oppose nonmedical exemptions, after splitting from the CDC schedule over what they called a departure from ‘long-standing medical evidence.’
‘AAP recommends immunizations that have been designed to teach the immune system to recognize and resist serious diseases,’ said Dr Sean O’Leary, chair of the AAP Committee on Infectious Diseases.
‘They are carefully tested and monitored over time. The pacing and combination of vaccines are based on what we know about when your child’s immune system is ready to learn and respond best.’
Trump’s push to split the MMR vaccine stems from a long-held personal belief, rooted in a debunked theory linking childhood vaccines to autism.
The president has publicly questioned whether the number of vaccines children receive can cause autism, despite decades of research finding no link.
He has framed the issue as a matter of ‘common sense,’ telling reporters last year: ‘This is based on what I feel. It seems to be that when you mix them, there could be a problem. So, there’s no downside in taking them separately. In fact, they think it’s better.’
He has said that he and First Lady Melania Trump deliberately spaced out vaccines for their son Barron, describing it as ‘the old-fashioned way.’
A federal judge blocked similar changes in March, siding with major medical organizations that argued Health Secretary Robert F Kennedy Jr had unlawfully changed vaccine policy and improperly reconstituted the federal panel that advises the government on vaccines.
More than 40 studies involving over 5.6 million people have found no link between the MMR vaccine, or any vaccine, and autism.
The 1998 study that originally sparked fears was retracted, its author lost his medical license, and subsequent research has repeatedly reaffirmed the safety of childhood vaccines.
In late 2025, RFK Jr directed the CDC to remove explicit statements from its website declaring that vaccines do not cause autism.
The agency updated its text to instead highlight areas needing further observation, prompting criticism from public health groups.
The latest CDC data shows that 1 out of 31 kids were diagnosed by the time they turned 8, up from 1 out of 36 just two years earlier, but that increase is linked to broader diagnostic criteria, better screening and greater awareness, rather than vaccines.
Private insurers are still required to cover all ACIP-recommended vaccines at no cost, including those in the ‘shared clinical decision-making’ category. The order does not change that.
Major health insurers have also pledged to continue covering the broader September 2025 vaccine schedule through at least 2026, and some states have passed laws requiring insurers to cover vaccines beyond the federal minimum.
The one exception is HPV. Insurers are no longer required to cover additional doses beyond the newly recommended single dose, though some plans have pledged to do so temporarily.
