An endorsement of the Measles Mumps and Rubella (MMR) vaccine by Well being and Human Companies Secretary Robert F. Kennedy Jr. has provoked an indignant outcry from anti-vaccine activists.

“The simplest method to forestall the unfold of measles is the MMR vaccine,” Kennedy mentioned within the third paragraph of a prolonged publish on the social media platform X. Kennedy made the publish following conferences on Sunday in Gaines County, Texas with the households of two kids who have died of measles throughout a latest outbreak within the state. He additionally mentioned he had instructed the Facilities for Illness Management and Prevention to “provide pharmacies and Texas run clinics with wanted MMR vaccines,” together with different medical provides.

Kennedy’s endorsement is according to all out there scientific proof on the MMR vaccine. “A single dose is roughly 93% efficient at stopping sickness, and the second dose will get that as much as 97%,” says Dr. Paul Offit, director of the Vaccine Training Heart on the Kids’s Hospital in Philadelphia. In line with the Texas Division of State Well being Companies, simply 10 of the 481 measles instances recorded as of April 4 had been in partially or absolutely vaccinated people — that is round 2% of all general instances. Thus far three unvaccinated folks, the 2 kids in Texas and an grownup in New Mexico, have died from the illness.

“I am delighted to listen to what Secretary Kennedy has mentioned about giving the vaccination,” says Dr. Kathryn Edwards, a retired professor of pediatric infectious illness. Edwards mentioned she’d hoped for an express endorsement of the vaccine a lot earlier in January however that “it is higher late than by no means.”

However Kennedy’s suggestion that the vaccine was efficient infuriated a number of members of the anti-vaccine group who responded on X to the assertion.

Anti-vaccine Anger

“I am sorry, however there isn’t a protection for this poorly worded assertion,” wrote Dr. Sherri Tenpenny, a distinguished anti-vaccine activist who as soon as claimed throughout a legislative listening to in Ohio that the COVID vaccine might trigger sufferers to grow to be magnetized, permitting them to stay “spoons and forks” throughout their our bodies.

Del Bigtree, a distinguished anti-vaccine activist who supported Kennedy’s presidential run and lately co-founded a non-profit with him referred to as MAHA Motion, additionally questioned the well being secretary’s endorsement. Bigtree urged that Kennedy’s publish had “obtained reduce off.” He then went on to make unproven claims about vaccines and autism, and linked to a documentary he had made on the subject.

“We voted for difficult the medical institution, not endorsing it,” posted Dr. Mary Talley Bowden, a Texas-based doctor who has opposed COVID vaccines and is at the moment combating a criticism from Texas’s medical board over hospital admitting privileges. Bowden says the criticism is expounded to her prescribing sufferers ivermectin. Ivermectin is an unproven various remedy for COVID.

“Kennedy was a type of candidates that attracted individuals who may not vote for Trump,” Bowden advised NPR in an interview. A lot of the attraction was from individuals who had been “very fed up with what occurred in the course of the pandemic,” she says. “Neither Biden or Trump had been prepared to even speak concerning the pandemic, and Kennedy was,” she says.

A funeral procession is seen after the second measles dying within the state, Sunday, April 6, 2025, in Seminole, Texas.

Annie Rice/AP

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Annie Rice/AP

She says that Kennedy’s determination to endorse the MMR vaccine to manage the outbreak reminds her of the heavy-handed response to COVID.

“Do we have to make a proclamation, ‘Okay, that is what must be performed’?” she says. “That is what rubs me the incorrect manner.”

Kennedy’s assertion additionally contradicts years of his personal vaccine skepticism. The well being secretary previously chaired an anti-vaccine non-profit referred to as Kids’s Well being Protection that, throughout a measles outbreak in 2019, tried to sue New York over the state’s faculty vaccine requirement. It in the end misplaced the case.

In 2023, throughout an interview with the favored podcaster Joe Rogan, Kennedy denied that the measles vaccine had led to a drop in deaths. He claimed that malnutrition was the basis reason for measles deaths, and that by the point the vaccine debuted in 1963, mortality was already low. The few deaths that did happen “had been all children within the Mississippi Delta, black children, severely malnourished, and so they had been dying of measles,” he advised Rogan. Kennedy didn’t cite any proof for that declare.

In his new function, the well being secretary has sometimes acknowledged the efficacy of the MMR shot. “Vaccines not solely shield particular person kids from measles, but in addition contribute to group immunity, defending those that are unable to be vaccinated because of medical causes,” he wrote in an op-ed on Fox Information on March 2. However in the identical publish, Kennedy claimed vitamin A can “dramatically cut back measles mortality.” Offit says vitamin A doesn’t have an effect on the illness course in developed nations like america, and that it may well injury kids’s livers in giant doses. Texas Public Media reported that a number of kids in West Texas had been hospitalized with vitamin A toxicity following his Fox Information assertion.

Various Therapies

It was unclear why Kennedy selected this second to explicitly endorse the MMR shot. The Division of Well being and Human Companies didn’t instantly reply to NPR’s request for a remark. In a second publish later Sunday night, Kennedy posted photos posing with the households of those that had misplaced kids, and promoted two therapies, “aerosolized budesonide and clarithromycin.”

Budesonide is an inhaled steroid used to deal with bronchial asthma and has “no function in measles,” Offit says. Clarithromycin is an oral antibiotic, however Offit says it is the incorrect form of antibiotic for treating secondary bacterial infections brought on by measles. “Each of these issues are worthless,” he says.

Offit says that, regardless of Kennedy’s on-line endorsement, he expects the measles outbreak to proceed and presumably worsen. “It is a huge outbreak that’s not being managed,” Offit says. Measles was eradicated within the U.S. in 2000, however it’s killing kids once more. “I’ve by no means been extra upset; it is simply so laborious to observe this.”

NPR’s Selena Simons-Duffin and Rob Stein contributed to this report.