MMR vaccination rates declined 78% since 2019, study finds
A JAMA study published June 3 found that of 2,237 counties across the U.S., 78% reported declines in vaccination rates for measles, mumps and rubella from 2019 through 2024. The study said that measles is likely to return to endemic levels in the U.S. if MMR vaccination rates continue to decline.
The Centers for Disease Control and Prevention released guidance May 28 advising all international travelers to be vaccinated against measles. As of May 29, there have been 1,088 confirmed cases of measles in the U.S. this year, according to CDC data. There were 285 in 2024. So far in 2025, cases have been reported by 32 states. The vaccination status of 96% of all cases is classified as “unvaccinated or unknown.”
Related News Articles
Headline
There are now 602 cases in the Utah measles outbreak, the state’s Department of Health and Human Services reported April 14. Of those, 405 cases have been…
Headline
The Utah measles outbreak has increased to 583 cases, the state’s Department of Health and Human Services reported April 7. Of those, 386 cases have been…
Headline
Cases in the Utah measles outbreak have increased to 559, the state’s Department of Health and Human Services reported March 31. The agency said 362 cases have…
Headline
A measles outbreak in Utah is now at 486 cases, with 107 reported in the last three weeks, according to data from the state’s Department of Health and Human…
Headline
The Centers for Disease Control and Prevention announced today that there are now 1,487 confirmed measles cases nationwide so far this year. The CDC said 5% of…
Headline
The South Carolina Department of Public Health March 6 reported that the state’s measles outbreak is at 991 cases. The agency said the vaccination status of…