The CDC is deploying a disease detective to Pennsylvania to help control a rapidly growing measles outbreak that has now infected over 1,200 people. The move comes as state health officials scramble to contain the spread in a county without its own health department.
Measles Outbreak Surges in Pennsylvania
As of Wednesday, Pennsylvania had confirmed 1,222 measles cases, a dramatic jump from just 86 the previous week. Six measles-associated deaths have also been reported, underscoring the severity of the situation. The outbreak is centered in Lancaster County, which has recorded more than 415 confirmed cases as of October 9.
Lancaster County is the largest county in Pennsylvania without its own health department, leaving local officials at a disadvantage. The CDC's intervention aims to provide expert support and resources to help manage the crisis.
CDC Sends Disease Detective and Funds
On Thursday, the CDC announced it would send a scientist from its Epidemic Intelligence Service—often called a disease detective—to assist Pennsylvania health officials. The agency is also releasing nearly $4 million to aid the response efforts.
"CDC will continue working closely with Pennsylvania health officials to provide the expertise and support needed to respond to the outbreak and protect public health," a CDC spokesperson told NBC News. The CDC director, Dr. Erica Schwartz, emphasized that the MMR vaccine is "the most effective way to prevent measles and protect against infection."

Vaccination Key to Prevention
The measles outbreak has highlighted the importance of vaccination. The MMR (measles, mumps, and rubella) vaccine is highly effective at preventing measles, but vaccination rates in some communities remain low. The Amish community in Lancaster County, which has historically had lower vaccination rates, is among those affected.
Health officials are urging everyone to ensure they are up to date on their MMR vaccinations, especially in areas with active outbreaks. The CDC recommends two doses of the MMR vaccine for maximum protection.
Comparison of Measles Outbreak Response
| Response Measure | Before CDC Intervention | After CDC Intervention |
|---|---|---|
| Confirmed Cases | 1,222 (as of Wednesday) | Ongoing monitoring |
| Deaths | 6 | Targeted prevention |
| Expert Support | Limited local health department | CDC disease detective deployed |
| Funding | State and local resources | Additional $4 million from CDC |
Key Takeaways
- Measles outbreak in Pennsylvania has grown to over 1,200 cases with six deaths.
- CDC is sending a disease detective and nearly $4 million to help contain the spread.
- Lancaster County lacks a local health department, making CDC support critical.
- Vaccination with the MMR vaccine is the most effective way to prevent measles.
FAQ
What is a CDC disease detective?
A CDC disease detective is a scientist from the Epidemic Intelligence Service who investigates and helps control disease outbreaks. They are deployed to provide expert support during public health emergencies.
How many measles cases are in Pennsylvania?
As of Wednesday, Pennsylvania had confirmed 1,222 measles cases, up from 86 the previous week. Six measles-associated deaths have been reported.
Why is Lancaster County at a disadvantage?
Lancaster County is the largest county in Pennsylvania without its own health department, which limits its ability to respond to the outbreak. The CDC's assistance is helping fill that gap.