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Since the end of August, the number of measles cases has doubled in Warren County.
On Friday, the Pennsylvania Department of Health announced that 577 measles cases have been confirmed across 37 counties. The Department continues its robust response to the ongoing measles outbreak and provides Pennsylvanians with updated information on cases, hospitalizations, and deaths.
Warren County’s confirmed cases rose from three to six.
The Department of Health is proactively working with residents, community organizations, and health care providers to combat the measles outbreak in the Commonwealth through access to fact-based information and access to the measles, mumps, and rubella (MMR) vaccine.
State health officials have administered more than 3,900 MMR vaccinations at more than 100 pop-up vaccination clinics in the affected communities since the outbreak began in late April. Dozens of additional vaccine clinics are scheduled for the upcoming weeks and months, based on community interest and need. Overall, state health center staff have administered more than 5,700 MMR vaccine doses to residents across the Commonwealth in 2026.
Health care providers have also seen a surge of interest from residents seeking MMR vaccinations. In a typical month, Pennsylvania health care providers administer approximately 25,000 doses of the MMR vaccine. In August, more than 46,000 MMR vaccines were administered across the Commonwealth.
The best protection against measles is getting fully vaccinated. The MMR vaccine is given in a two-dose series and provides 97 percent protection against measles after two doses.
MMR vaccine is available across the state by contacting a health care provider, county or municipal health department, DOH State Health Center, Federally Qualified Health Centers (FQHCs), or a Vaccines for Children (VFC) program.