The United States faces its most rapid measles outbreak in over three decades, with cases surging and vaccination rates falling amid political debates and misinformation, prompting renewed public health warnings.
Measles is spreading across the United States at its fastest pace in more than three decades, with the Centres for Disease Control and Prevention reporting more than 2,700 cases in 2026, already above last year’s total. The CDC has said nearly all cases this year have been tied to outbreaks rather than isolated infections, underscoring how quickly the virus can move through communities with lower vaccination coverage.
Pennsylvania has become the centre of the biggest current outbreak, with state health officials reporting 460 confirmed cases across 31 counties as of August 28, including a sharp rise in the previous week and dozens of hospitalisations. Lancaster County accounts for about half the cases. The state also reported two measles-associated deaths on August 25, including a newborn, both of whom were unvaccinated. That description has since been disputed by the Lancaster County coroner, who said the infant died from a lacerated spleen shortly after birth, although a post-mortem lung test found the baby had contracted measles before birth. State officials say the classification remains appropriate because a death can be considered measles-associated when laboratory or epidemiological evidence links the virus to the case, even if it was not the immediate cause.
The dispute has become political after Health and Human Services Secretary Robert F. Kennedy Jr. publicly questioned the reporting of the deaths. Pennsylvania officials pushed back, saying both people had tested positive for measles and the deaths were reported to federal health authorities the next morning. Governor Josh Shapiro has accused Kennedy of fuelling confusion about vaccines at a time when coverage has fallen, with national MMR vaccination rates down to 92.4% from 95% in 2019. In Wisconsin, the state’s largest measles outbreak since 1990 has climbed to 98 linked cases in the south-west, with Iowa, Lafayette and Grant counties among the hardest hit. State officials say nearly all infected people were unvaccinated, and the CDC has sent public health staff to assist with tracing contacts.
Georgia is also dealing with a growing cluster linked to a metro Atlanta day-care, where four new cases were confirmed among children who had close contact with an earlier case and were either unvaccinated or not fully vaccinated. The state’s total for the year has risen to 11, its second-highest annual count in a decade. Health officials warn that measles is exceptionally contagious, can linger in the air for up to two hours, and typically begins with fever, cough, a runny nose and watery eyes before a rash appears days later. They continue to urge families to call ahead before seeking care in person and to rely on the MMR vaccine, which remains the strongest protection against infection. CDC figures can lag behind state reports, and local doctors in Pennsylvania say the true number of cases there is likely higher than the official tally.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
