US childhood immunisation rates are declining once again, with coverage for MMR dropping below 95%, threatening to fuel rising outbreaks of measles and other preventable diseases, as disparities across states widen.
Childhood immunisation rates in the United States have slipped again, deepening concerns that outbreaks of vaccine-preventable diseases will become more common as protection thins in schools and communities. The latest figures from the Centers for Disease Control and Prevention show MMR coverage among kindergarten pupils at 92.4%, below the 95% level generally needed to help stop measles spreading widely.
That drop comes as the country is already facing an unusually severe measles year. The CDC said in May that it had confirmed 1,952 cases across 38 states and the District of Columbia, with more than 1,400 among children and teenagers aged 19 and under. The agency has also warned clinicians to stay alert for measles, noting that the illness can be serious: in 2025, 12% of reported US cases required hospital treatment and there were three confirmed deaths.
Public health experts say the pattern is not evenly distributed. New York, California and West Virginia have largely held up better because of stronger school-entry rules and public health infrastructure, while other states have seen weakening coverage for measles, diphtheria, tetanus and pertussis, and polio shots. Nationally, non-medical exemptions have risen, leaving more children unprotected and more communities exposed to outbreaks.
Robert Hopkins Jr., medical director of the National Foundation for Infectious Diseases, said the response must be local and persistent, with schools, health departments, doctors, parents and media all working together. The CDC has separately said declining trust in health institutions and falling childhood vaccination rates are increasing the risk of disease spread, while its childhood schedule still recommends routine vaccination from birth through age 18. For parents and caregivers, the message from health officials is straightforward: staying on schedule remains the best protection.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
