Key Points
Philadelphia reported measles exposures at the airport and a children's hospital within one week.
Pennsylvania has recorded 767 measles cases and four deaths in 2026 alone.
The US has surpassed 3,000 measles cases across 45 states and Washington, D.C.
The MMR vaccine provides 97% protection but vaccination rates have declined since the pandemic.
Philadelphia reported two measles exposures within a week, one at Philadelphia International Airport on September 13-14 and another at Children’s Hospital of Philadelphia on September 11. The cases reflect a broader outbreak: Pennsylvania has recorded 767 measles cases and four deaths so far in 2026, while the US has surpassed 3,000 cases across 45 states and Washington, D.C. Health officials urge vaccination as the MMR vaccine provides 97% protection.
Two exposures reported in Philadelphia within days
An individual with measles traveled through Philadelphia International Airport terminals B and F, plus connecting areas C, D, and E, from 7:45 p.m. on September 13 to 12:05 a.m. on September 14. The traveler did not leave the airport. Two days earlier, on September 11, a separate measles case exposed people at Children’s Hospital of Philadelphia, including the NICU West unit, family lounge, atrium, and main cafeteria between 9:30 a.m. and 4:15 p.m. Officials said the two cases are unrelated.
Pennsylvania outbreak accelerates with four deaths
Pennsylvania has recorded 767 measles cases across 38 counties as of September 22, with nearly 40 cases reported since September 16. Four measles-related deaths have occurred in the state. Nationally, the US has confirmed over 3,000 measles cases in 45 states and Washington, D.C. in 2026. The last time the US reported four measles deaths was in 1992.
Vaccination rates lag as MMR protection reaches 97 percent
The MMR vaccine, administered in two doses at ages 12-15 months and 4-6 years, provides about 97% lifetime protection. However, only 92.4% of kindergartners received the MMR vaccine during the 2025-2026 school year, down from 95.2% before the COVID-19 pandemic. Pennsylvania has administered more than 40,000 MMR doses in the last month in response to the outbreak. Health Commissioner Dr. Palak Raval-Nelson stated that fully vaccinated Philadelphians have little to fear and protect vulnerable populations by being vaccinated.
What to do if exposed
Anyone at Philadelphia International Airport during the September 13-14 window or at CHOP on September 11 should check their vaccination status. Unvaccinated people, infants, pregnant individuals, and immunocompromised people should contact their doctor. Measles symptoms include fever, runny nose, cough, red watery eyes, and rash. Severe cases can lead to pneumonia, brain infection, and death.
Final Thoughts
With measles cases surging nationally and Pennsylvania recording four deaths in 2026, vaccination remains the strongest defense. Fully vaccinated individuals face minimal risk and protect vulnerable populations who cannot be vaccinated.
FAQs
Pennsylvania has recorded 767 measles cases across 38 counties with four deaths as of September 22, 2026.
The MMR vaccine provides approximately 97% lifetime protection against measles when given in two doses.
The exposure occurred in terminals B and F, plus connecting areas C, D, and E, from 7:45 p.m. September 13 to 12:05 a.m. September 14.
The US has reported over 3,000 measles cases across 45 states and Washington, D.C. in 2026.
Disclaimer:
The content shared by Meyka AI PTY LTD is solely for research and informational purposes. Meyka is not a financial advisory service, and the information provided should not be considered investment or trading advice.
About Author

Danny Kontos
Co FounderDanny Kontos has been a stock investor since 2007 and co-founded Meyka in 2023. He keeps a small, focused portfolio and only moves when the numbers are hard to argue with. He has waited years on a single position before. Before Meyka, he ran a web hosting company and a mortgage lending platform, so he knows what a well-run business actually looks like under the hood. This article did not come from a news cycle. It came from someone who has been watching this space for a long time.
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