Measles Cases Grow in Lancaster County

Outbreak spreads to neighboring Chester County

Published on Feb. 21, 2026

Got story updates? Submit your updates here. ›

The Pennsylvania Department of Health has reported two new measles cases, including one in Lancaster County. This adds to the growing number of measles cases in the region, with the outbreak now spreading to the neighboring Chester County.

Why it matters

Measles outbreaks can be concerning as the highly contagious disease can lead to serious complications, especially for unvaccinated individuals. Public health officials are working to contain the spread and encourage vaccination in the affected communities.

The details

The two new cases bring the total number of measles cases in Lancaster County to an undisclosed amount. One of the new cases is a Lancaster County resident, while the other is in neighboring Chester County, indicating the outbreak is spreading to nearby areas.

  • The Pennsylvania Department of Health reported the two new cases on February 21, 2026.

The players

Pennsylvania Department of Health

The state agency responsible for monitoring and responding to public health issues, including disease outbreaks, in Pennsylvania.

Got photos? Submit your photos here. ›

What’s next

Public health officials are urging residents in the affected counties to ensure their measles vaccinations are up to date and to watch for symptoms of the disease.

The takeaway

This measles outbreak highlights the importance of vaccination in preventing the spread of highly contagious diseases, especially in densely populated areas. Continued vigilance and public health efforts will be crucial to containing this outbreak.