US Measles Fatalities Rise to Ten as Outbreak Escalates

State health authorities in Pennsylvania and Wisconsin have reported two additional deaths linked to measles, bringing the total number of fatalities in the United States during the current outbreak to ten. The total number of confirmed cases nationwide has now passed 5,400, according to data from the Centers for Disease Control and Prevention (CDC) and the Johns Hopkins University International Vaccine Access Center. This figure is more than double the 2,289 cases recorded across the country in 2025.

The Wisconsin Department of Health Services reported the death of an infant on Friday, while health authorities in Pennsylvania confirmed the death of an unvaccinated patient who tested positive for measles. Pennsylvania has registered seven deaths and 1,542 cases, making it the state hardest hit by the current outbreak. Wisconsin has recorded 651 cases and two deaths, while New York state reported a fatal case involving a child on November 2.

A dispute has arisen between federal officials and state health leaders regarding the official classification of these deaths. United States Health Secretary Robert F. Kennedy Jr. asked CDC Director Erica Schwartz not to include certain fatalities in the national count, stating that there was insufficient evidence proving they were caused by measles. Pennsylvania Governor Josh Shapiro has maintained the state's classification system, which records a death as measles-associated if a patient with a confirmed case dies within 30 days of symptom onset, provided the cause was not an unrelated event.

The CDC currently lists six measles deaths on its official website, which is twice the count recorded by the agency in 2025. Epidemiologists noted that tracking deaths occurring within 30 days of infection has long been the standard methodology utilized by both the World Health Organization and federal health authorities. The CDC stated that it is currently working with the Council of State and Territorial Epidemiologists to define a standardized criteria for counting measles fatalities.

The sustained outbreak threatens the status of the United States as a country that has eliminated measles, a designation officially granted in 2000. Maintaining elimination status requires preventing continuous viral transmission within national borders for 12 months or longer. Public health statistics show that vaccination coverage among kindergarten students in the United States fell from 95.2 percent during the 2019–2020 school year to 92.4 percent in the 2025–2026 school year. Two doses of the measles, mumps, and rubella vaccine provide approximately 97 percent protection against the virus.

Written by Andreas Hofer andreas.hofer@alpineweekly.com