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Health officials in Wisconsin and Pennsylvania are issuing fresh warnings about measles after a new case was confirmed in Chippewa County, Wisconsin, while a person with measles was reported to have traveled through Philadelphia International Airport.
The Wisconsin Department of Health Services confirmed the Chippewa County case on September 22. The case is linked to out-of-state travel and is not connected to the ongoing measles outbreak in southwestern Wisconsin. Officials said they are working to identify anyone who may have been exposed, and no public exposure locations had been identified as of September 22.
The latest case brings Wisconsin's confirmed measles total to 171 in 2026. Health officials are also monitoring cases in Grant, Iowa, Lafayette, Marathon and Vernon counties.
Separately, Philadelphia health officials have warned of a possible measles exposure at Philadelphia International Airport.
According to the Philadelphia Department of Public Health, a person with measles passed through Terminals B and F, along with connecting areas in Terminals C, D and E, during the evening of September 13 and early hours of September 14. The individual was traveling through the airport and did not leave the facility.
Officials have advised potentially exposed travelers to check their measles vaccination status and monitor for symptoms. The airport exposure was reported as separate from an earlier measles exposure at Children's Hospital of Philadelphia.
Measles is a highly contagious respiratory virus. Common symptoms include fever, cough, runny nose and red or watery eyes, followed by a characteristic rash. Symptoms can appear days after exposure, making identification and monitoring important.
Health authorities continue to emphasize vaccination and recommend that people who believe they may have been exposed consult a healthcare professional, particularly if they are unsure of their vaccination status or develop symptoms.
The developments in Wisconsin and Philadelphia highlight the continued importance of measles surveillance, vaccination and timely public-health notifications as cases are detected in different parts of the United States.
