In The Politics of Autism, I analyze the discredited notion that vaccines cause autism. This bogus idea can hurt people by allowing diseases to spread. And among those diseases could be measles and COVID-19.
Antivaxxers are sometimes violent, often abusive, and always wrong.
Annenberg Public Policy Center:
The number of measles cases in the United States is at the highest level in decades, attributed to a decrease in vaccination against measles. And while U.S. Health and Human Services Secretary Robert F. Kennedy Jr. told American parents on Aug. 2 that they should get their children vaccinated against measles, the public remains evenly divided on whether or not he recommends the MMR (measles, mumps, and rubella) vaccine.
According to the latest nationally representative survey from the Annenberg Public Policy Center (APPC) of the University of Pennsylvania, conducted Aug. 4-17, 2026, among more than 1,900 U.S. adults, the proportion of adults who say Kennedy recommends that children be vaccinated against measles is just under a third, at 31%. While this represents a significant increase since August 2025, when 23% of Americans thought he recommended measles vaccination for children, most people either still think that Kennedy does not recommend the vaccine (29%) or are unsure whether or not he recommends it (40%). The public is evenly divided between those who think Kennedy does (31%) or does not (29%) recommend the vaccine.
A longtime vaccine skeptic, Kennedy has as HHS secretary made misleading and unsupported claims about the MMR vaccine, the measles, and vaccination in general, according to FactCheck.org, a project of APPC. He also has downplayed the risks of measles and the 2025 measles outbreak in Texas.
“As measles cases rise and the U.S. is poised to lose its measles elimination status, this country is paying the price for skepticism about vaccination against measles that RFK Jr. played a central role in promoting,” said Kathleen Hall Jamieson, APPC’s director emerita. “His ability to address the current U.S. measles outbreaks is hampered by the fact that most adults are either unsure about his stand on childhood vaccination against measles or believe that he does not recommend it.”
...A majority (68%) of respondents say that it is false to state that “vaccines given to children for diseases like measles, mumps, and rubella cause autism,” while 13% say that statement is true and 19% are not sure. These percentages are statistically unchanged since 2022. In June of 2021, however, significantly more (74%) thought it was false to claim there is a link between vaccines and autism.
Just over half (52%) think that children who are fully vaccinated are “about as likely” to show signs of autism as children who are not fully vaccinated, while 9% think fully vaccinated children are “more likely,” 12% believe they are “less likely,” and 28% are not sure of the likelihood. Those saying fully vaccinated children are “more likely” to show signs of autism has decreased from 12% in February 2026.
“This small decrease in endorsing a link between vaccination and autism is good news in our survey data,” says Ken Winneg, APPC’s managing director of survey research. “However, when looking at the same people over time, there is no relationship between accurate change in knowledge of RFK Jr.’s recommendations and decreases in endorsing this misbelief.”