On August 10, 2026, President Donald Trump signed an executive order recommending that the measles, mumps and rubella vaccinations be administered as three separate injections rather than as the combined MMR vaccine. The order also proposed limiting the number of core childhood vaccinations to 11 and moving vaccines for hepatitis B, COVID-19, and influenza for young children into a shared clinical decision-making category rather than routine universal recommendation.
The administration suggested that 1-year-olds receive their childhood vaccinations during five separate medical appointments. The executive order has prompted widespread concern among public health experts, researchers and clinicians who say the change is not supported by scientific evidence and could have negative consequences for child health and vaccination uptake.
Several experts and professional organizations publicly rejected the executive order’s premise that the combined MMR vaccine is linked to autism. The original 1998 paper that suggested such an association has been retracted and found to be based on fraudulent data from a small number of children. Multiple subsequent studies conducted over decades have failed to demonstrate any association between MMR vaccination and autism.
The article cites a recent large cohort study in the Pediatric Infectious Disease Journal that followed 2,560,035 U.S. children from birth to age 8 and, after controlling for bias, found no association between receiving MMR before 24 months and childhood autism. Experts emphasized that this body of evidence directly contradicts the executive order’s rationale.
Clinicians quoted in the reporting expressed frustration that political messaging is repeating a disproved claim. Jennifer M. Walsh, DNP, CPNP-PC, CNE, said there is “absolutely no benefit” to separating the measles, mumps and rubella vaccines and highlighted practical harms of dividing the series. Other experts, including David Salisbury and Sir Andrew Pollard, stressed that there is a “wealth of evidence” showing no link between vaccines and autism and that policy changes should be driven by scientific evidence from qualified experts.
The executive order’s reclassification of certain vaccines into shared decision-making would, according to many clinicians cited, introduce clear risks. The reporting summarizes expert perspectives on three vaccines specifically mentioned in the order:
Hepatitis B: Experts reminded readers that routine hepatitis B vaccination beginning at birth has prevented millions of cases of chronic infection and reduced the long-term risk of liver disease and liver cancer.
Influenza: Annual influenza vaccination starting at 6 months of age has been shown to reduce outpatient visits, emergency department visits, hospitalizations and deaths in children. Changing its recommendation could reduce these protective effects.
COVID-19: Vaccination is recommended for children ages 6–23 months and for children with underlying health issues because these groups are at higher risk of severe outcomes; experts warned that deprioritizing COVID-19 vaccines for children could increase preventable complications.
Sir Andrew Pollard is quoted as warning that reducing the number of vaccines recommended for children and questioning vaccine safety can undermine public confidence in essential child health programs. He and others emphasized that changes in vaccination policy should follow robust scientific evidence and the judgment of experts in infectious disease and public health, not political decisions made without sufficient expertise.
Experts interviewed for the article advised parents to continue following current clinical guidance and to seek advice from their child’s healthcare provider. Jagdish Khubchandani, PhD, noted that separate measles, mumps or rubella vaccines are currently unavailable and would likely require testing or Food and Drug Administration approval before they could be offered in the U.S. He also pointed out practical burdens for clinicians and families if the MMR were to be split into separate appointments, including scheduling, transportation and additional clinic visits.
Jennifer M. Walsh reiterated practical risks of splitting the MMR series: delayed protection against vaccine-preventable diseases, increased financial and time burdens on families and the healthcare system, potential for multiple side effects across visits necessitating time off work or childcare, and added trauma to young children from repeated visits.
The American Academy of Pediatrics has publicly disputed the recommendations in the executive order, and many states indicated they will continue to follow AAP and CDC vaccination schedules, which at the time of reporting had not changed. Khubchandani told Medical News Today that, even if the executive order prompted regulatory steps, the proposed changes could take months to years to have any practical effect.
Parents should consult their child’s physician for personalized advice and rely on current CDC and AAP guidance rather than political statements. The reporting concludes that, for the remainder of the year covered by the article, nothing in routine clinical practice had changed and the evidence base supporting the combined MMR vaccine and routine childhood vaccination schedules remained intact.