Overview
- The Philadelphia Department of Public Health says the exposure took place in Terminals A, B and C at Philadelphia International Airport between 7:30 a.m. and 11:15 a.m. on July 4.
- People are considered immune if they have two documented MMR doses, documented prior measles infection, or were born before 1957 and those people generally do not need follow-up.
- The health department advises that anyone who is not immune should call a doctor immediately, have the doctor notify public-health authorities, plan to quarantine for 21 days, and seek possible post-exposure treatment.
- Pennsylvania is reporting 105 confirmed measles cases in 2026 with 63 in Lancaster County, and the state has launched an online dashboard that will update case counts, hospitalizations and vaccination data several times a week.
- Measles spreads easily through the air and can linger for up to two hours, so infants, pregnant people and immunocompromised individuals are at higher risk and should check vaccination status, watch for symptoms through July 25, or call the health department hotline to report exposure.