Trump orders childhood vaccines be spaced out into separate visits

Trump orders childhood vaccines be spaced out into separate visits

President Donald Trump signed an executive order Monday calling for revised childhood vaccine recommendations that would separate immunizations into different medical visits, promoting his long-held but scientifically disputed view on vaccine scheduling.

The order advocates splitting the measles, mumps and rubella (MMR) vaccine into three single-disease shots and administering all childhood immunizations at separate appointments whenever possible. It also directs the Department of Health and Human Services to improve vaccine research and present a plan to offer separate measles, mumps, and rubella vaccines for children, though such options are not currently available in the United States.

The announcement comes as the nation grapples with over 2,400 confirmed measles cases across 45 states as of early August 2026, the highest number since the disease was declared eliminated in 2000 and the most cases since 1991. The Pan American Health Organization is scheduled to review the U.S. measles elimination status in November 2026, with public health experts warning the country is highly likely to lose its elimination status.

Public health concerns mount

Public health experts have raised concerns that spacing out shots as Trump suggests can increase the risk that children become infected with a vaccine-preventable disease before returning for another visit. Childhood vaccines and their combination schedules undergo rigorous studies, with safety tracking continuing for years as the shots are used.

Trump called the announcement a "major victory for parents rights, religious and constitutional rights, and for the gold standard science." Speaking in the Oval Office Monday, he repeatedly suggested the number or timing of vaccines could play a role in rising rates of autism spectrum disorder, even as scientific consensus and decades of studies have firmly concluded there is no link.

Dr Andrew Racine, president of the American Academy of Paediatrics, said the announcement spreads unnecessary uncertainty, fear and confusion. "Science about vaccines and their efficacy has not changed," he said. "The distribution of viruses and other pathogens in our environment has not changed. Children in this country have not changed in the last 48 hours."

Racine noted the potential vaccine-autism link had been studied in "over 40 methodologically well-designed studies in over seven countries involving over 5 million children," concluding unequivocally there is no connection.

Political pushback and declining vaccination rates

Sen. Bill Cassidy, the Republican chair of the Senate health committee, slammed the executive order in a social media post. "I'm a doctor. This executive order is wrong," the Louisiana senator wrote. "The President does not have the expertise to make these changes."

The order comes amid declining vaccination rates nationwide. MMR vaccination coverage among U.S. kindergartners fell to 92.5% during the 2024-25 school year, down from 95.2% in 2019-2020, well below the 95% threshold experts say is needed to maintain herd immunity and prevent measles transmission. Vaccine exemptions among kindergartners reached 3.6% during the 2024-25 school year, up from 2.2% in 2014-15, with nearly all of the increase due to non-medical exemptions which hit an all-time high of 3.4%.

Federal data shows approximately 92-93% of U.S. measles cases in 2025 and 2026 have been in people who were unvaccinated or had unknown vaccination status.

Authority and implementation questions

While the order calls for revised vaccine recommendations, states, not the federal government, have the authority to require vaccinations for schoolchildren. The order advises states with school vaccine mandates to consider updating their laws to reflect the administration's preferred schedule.

The order includes several changes to the childhood vaccine schedule that the health department has already attempted, but which were blocked by a federal judge in Massachusetts. A March 16, 2026 preliminary injunction stayed Kennedy's appointments to the CDC's Advisory Committee on Immunization Practices and blocked vaccine schedule changes, ruling the appointments likely violated the Federal Advisory Committee Act.

A White House official said Trump was within his right to provide his own recommendation through the executive order and said the lawsuit blocking the health department's schedule was a separate issue.

Role of newly confirmed CDC director

Changes to federal childhood vaccine recommendations customarily require approval from the director of the Centers for Disease Control and Prevention. The newly Senate-confirmed CDC director, Dr Erica Schwartz, who was approved in a 51-44 vote on August 5, 2026, oversaw policies promoting vaccination of service members while in a leadership position at the US Coast Guard. The retired Navy rear admiral and former deputy surgeon general becomes the first permanent CDC director in nearly a year and the first Black woman to lead the agency.

Public health law expert Lawrence Gostin at Georgetown University said the Supreme Court's interpretation of Trump's power may allow him to supersede Schwartz if she does not agree to new recommendations. "This is clearly the first test for Dr Erica Schwartz," Gostin said. "The President is placing her in an untenable position."

Asked why the president was advocating splitting MMR into three single-disease vaccines, a White House official did not provide supporting studies but said that was Trump's long-held view and that some countries provide individual measles vaccines in certain circumstances.

Kennedy's vaccine agenda

Health Secretary Robert F. Kennedy Jr., an anti-vaccine activist before entering politics, has worked to overhaul immunization guidance at HHS. In June 2025, he fired all 17 members of the CDC's Advisory Committee on Immunization Practices, saying a "clean sweep is necessary to re-establish public confidence in vaccine science," and installed replacements who made more restrictive recommendations. He also personally directed the CDC to abandon its position that vaccines do not cause autism, without supplying new evidence to support the change.

Throughout his second term, Trump has been fixated on connecting autism to vaccines. He recently ramped up pressure on Kennedy to identify the cause of autism, something Kennedy had pledged to do with new research. In a Cabinet meeting last month, Trump asked Kennedy, "How are you doing on the autism research?" Kennedy responded, "We will have an answer for you."

In the Oval Office Monday, Kennedy repeated his assertion that he believes an unknown environmental factor is to blame for rising autism diagnoses and said his department will deliver research findings "as soon as they are ready."

Trump spokesperson Kush Desai said the president is "one of countless parents who have voiced questions and concerns about the combined MMR vaccine" and said the plan to develop single-disease vaccines would "give parents more options on timing and frequency for their children," ultimately increasing vaccine uptake. However, studies of babies and toddlers in the US have shown that the use of combination shots for childhood vaccines, rather than single ones, increased the likelihood of completing all recommended vaccinations by age 2.