Measles cases hit 4,588 as experts warn official numbers undercount the real spread
Pennsylvania reports five deaths while federal data lists three, creating a gap in official records.
By Marco Kapoor ·
The Centers for Disease Control and Prevention reported 178 new measles cases in the United States this week.
The agency's data shows 4,588 total cases for 2026 as of Friday. This figure is more than double the count from 2025. The illness is spreading across at least 43 distinct outbreaks. Pennsylvania alone accounts for 1,338 of the reported cases. South Carolina and Utah are also seeing large clusters, with each state reporting more than 500 cases.
Health experts note that official numbers likely undercount the disease. Measles is highly contagious, and early symptoms like fever and cough often do not prompt immediate medical visits. The vaccine prevents the disease in 97% of cases. However, one in five unvaccinated infected individuals requires hospitalization. The disease causes death in one to three people per 1,000 cases.
A discrepancy has emerged regarding fatalities. Pennsylvania state authorities have confirmed five measles-associated deaths and are investigating a sixth. The CDC has logged only three national deaths. The agency has not specified the location of the third death, leaving it unclear if that case overlaps with Pennsylvania's reports.
Robert F. Kennedy Jr., the Health and Human Services secretary, has drawn attention to the data handling. Reuters reported that Kennedy asked CDC officials in September to remove a specific death from the official tally. He questioned whether the virus directly contributed to that patient's death.
HHS also announced changes to the vaccine adverse event reporting system this week. A new proposal allows doctors to bill for reporting suspected vaccine injuries. The VAERS system has long been used by researchers to track rare safety issues, though anti-vaccine groups often cite it to raise concerns. Kennedy has replaced all 17 members of the vaccine safety board with ideologically aligned candidates, a move a court blocked in March.
The next step involves continued monitoring of the 43 active outbreaks. State and federal agencies will continue to reconcile their death counts as new data arrives.
