Measles vaccination rates in children have declined in most U.S. counties, study finds
The decline in childhood measles vaccination rates across the United States has raised concerns about the potential for outbreaks of this highly contagious disease. A recent study published in JAMA found that while overall vaccination rates have decreased, there is significant variation in coverage within states.
Researchers at Johns Hopkins University analyzed county-level data from 33 states and found that the MMR (measles, mumps, and rubella) vaccination rate dropped from 93.92% to 91.26% between the 2017-2018 and 2023-2024 school years. Of the 2,066 counties studied, 78% saw a decline in vaccination rates. Only four states – California, Connecticut, Maine, and New York – saw an increase in average county-level vaccination rates.
The study highlights the need for targeted vaccination strategies to address the diversity in vaccination levels both within and across states. The data also underscores the importance of maintaining high vaccination rates to prevent outbreaks of measles.
The CDC has reported a surge in measles cases, with 1,088 cases reported across the country, most of which are in West Texas. Texas is a prime example of a state where vaccination rates vary widely by county, with some areas experiencing lower rates that leave them vulnerable to outbreaks.
Dr. Céline Gounder, a CBS News medical contributor, emphasized the importance of vaccination in preventing measles outbreaks. The CDC reports that 96% of reported cases are in unvaccinated individuals or those with unknown vaccination status. Measles can lead to serious health complications and even death, making vaccination crucial for public health.
The CDC has also noted a decline in vaccination coverage for kindergartners, from 95.2% to 92.7% between the 2019-2020 and 2023-2024 school years. Maintaining high vaccination rates is essential to achieving herd immunity, where more than 95% of the community is vaccinated, making it difficult for the disease to spread.
As the threat of measles outbreaks looms, it is crucial for communities to prioritize vaccination and public health initiatives. By addressing the disparities in vaccination rates and implementing targeted strategies, we can work towards preventing future outbreaks and protecting public health.
Nicole Brown Chau is a deputy managing editor for CBSNews.com, specializing in national news and health stories. She is dedicated to providing accurate information and raising awareness on important public health issues.
