US measles cases exceed 4,400 as Pennsylvania health officials warn of pregnancy risks.
Is it spreading to new areas?
Spread confirmed
As of 20 October 2026, health officials have confirmed spreading infections in new jurisdictions, including Cayuga County and Long Island in New York, Chester County in Pennsylvania, Houston County in Georgia, and multiple counties in Minnesota.
Sources: CBS NewsSyracuse.comThe Philadelphia InquirerCBS News 2CBS News 3Key figures
| Figure | Value | Basis | As of | Sources |
|---|---|---|---|---|
| Total US Measles Cases Reported by CDC and health agencies. A separate CDC update reported on 18 October cited over 900 cases across 24 states. | 4,410 | Official | Sources: ReutersCIDRAPABC News | |
| Pennsylvania Measles Cases Stated by the Pennsylvania Department of Health. | 1,286 | Press reports | Sources: ReutersWGAL | |
| US Measles Deaths (CDC Count) Confirmed by the US CDC for national 2026 totals. | 3 | Official | Sources: The HillAl JazeeraReutersU.S. News & World Report | |
| Pennsylvania Measles Deaths Reported by Pennsylvania health officials, who stated federal counts exclude state-confirmed deaths. | 6 | Official | Sources: FOX 29 PhiladelphiaThe Philadelphia InquirerNBC NewsThe Guardian | |
| Lancaster County Cases Reported by local health data as the county with the highest total in Pennsylvania. | 452 | Press reports | Sources: LNP | LancasterOnline |
Who says what
| Who | Says | Date | Sources |
|---|---|---|---|
| Pennsylvania Department of Health | Reported 1,286 measles cases and six deaths in Pennsylvania, issued a warning regarding congenital measles, and stated the CDC is undercounting state fatalities. | Sources: CIDRAPNBC NewsReutersThe Philadelphia Inquirer | |
| Centers for Disease Control and Prevention (CDC) | Recognized three national measles deaths in 2026 and confirmed 4,410 national cases while deploying an epidemic intelligence officer to Pennsylvania. | Sources: The HillU.S. News & World ReportLNP | LancasterOnlineReuters | |
| Georgia Department of Public Health | Issued an exposure warning for a restaurant in Houston County and reported a case with potential links to Pennsylvania. | Sources: CBS NewsCBS News 2 | |
| Minnesota Department of Health | Identified 25 cases of measles across central and southeastern regions of Minnesota. | Sources: CBS News |
Summary
As of 20 October 2026, Pennsylvania health officials issued a public health warning regarding congenital measles and measles infections during pregnancy as state cases reached 1,286 and state officials reported six deaths.
Nationwide, US measles infections have reached 4,410 cases across at least 24 states in 2026, marking the largest national outbreak year since 1991. A discrepancy remains between official counts: the CDC recognizes three national deaths in 2026, while Pennsylvania state officials report six deaths in Pennsylvania alone and state that federal totals undercount state fatalities.
Federal authorities have deployed a CDC epidemic intelligence officer to Pennsylvania to assist state health authorities with field response and epidemiologic investigation as cases continue to expand across local counties.
Timeline
- Pennsylvania officials reported a sixth measles-related death in the state, involving a Franklin County resident.Sources: NBC10 PhiladelphiaCIDRAP
- Minnesota health authorities reported 25 confirmed cases in central and southeastern regions of the state.Sources: CBS News
- National case totals reached 4,410 as Pennsylvania officials accepted federal assistance while questioning CDC death counts.Sources: ReutersThe Philadelphia Inquirer
- Pennsylvania cases reached 1,286 as a CDC epidemic intelligence officer arrived to assist local outbreak response.Sources: ReutersLNP | LancasterOnline
- Pennsylvania health officials issued warnings on congenital measles and pregnancy risks while the CDC reported a third national death.Sources: NBC NewsThe Hill
Still unknown
- The reason for the discrepancy between the CDC's national death total of three and Pennsylvania health officials' state total of six deaths.
- Whether recent cases reported in other states like Georgia are directly connected to the primary outbreak in Pennsylvania.
- The long-term impact of low local vaccination coverage in under-immunized rural communities on transmission rates.