US measles cases reach 4,588 as death counts diverge

The Centers for Disease Control and Prevention reported 4,588 confirmed measles cases in the United States as of Friday, adding 178 new infections to the annual total. This figure represents more than double the number of cases recorded in 2025. The disease is currently spreading across at least 43 distinct outbreaks nationwide.

Pennsylvania continues to account for the largest share of infections. State officials logged 1,338 cases on Friday, maintaining their position as the hardest-hit state. South Carolina and Utah also report large surges, with each state recording more than 500 cases during the same period. Despite these high numbers, public health experts note that official tallies likely undercount the true spread because common symptoms like fever and cough often do not lead patients to seek medical care.

A discrepancy exists between federal and state death counts. Pennsylvania authorities have confirmed five measles-associated deaths and are investigating a sixth. In contrast, the CDC has reported three measles deaths nationally. The agency has not specified the location of the third death, leaving unclear whether it overlaps with the Pennsylvania figures or occurred elsewhere.

Tensions between state and federal data have drawn scrutiny amid leadership changes at the Department of Health and Human Services. Health Secretary Robert F. Kennedy Jr. reportedly asked senior CDC officials in September to remove a specific measles death from the official tally after questioning the role of the disease in the fatality. This request came as HHS announced changes to the Vaccine Adverse Event Reporting System, or VAERS. The proposed changes will allow doctors to bill for reporting suspected vaccine injuries.

Kennedy’s administration has also restructured vaccine oversight. He replaced all 17 members of the expert panel that previously reviewed vaccine changes with individuals who share his ideological views. A court blocked these new appointments in March. During his tenure, Kennedy has made several public claims regarding vaccine safety and dosage, including statements that the measles, mumps, and rubella vaccine contains aborted fetal debris.

The measles vaccine remains 97% effective at preventing the disease. Side effects are generally limited to injection-site soreness and low-grade fever. Without vaccination, one in five infected people requires hospitalization, and one to three people in 1,000 die from complications.