Outbreak Watch

US measles outbreaks: 17 Oct 2026

The summary as it stood at the end of this day.

Status: Outbreak growing Summary written

US measles cases reach 4,410 as Pennsylvania outbreak surpasses 1,250 cases

Is it spreading to new areas?

Spread confirmed

As of 16 October 2026, state health departments and news outlets reported measles spread into central and southeastern Minnesota, Georgia, and Laurel County, Kentucky.

Sources: CBS NewsCBS News 2Spectrum News

Key figures

FigureValueBasisAs ofSources
US Total Measles Cases
The CDC reported 4,410 confirmed measles cases nationwide following an 8% weekly increase.
4,410OfficialSources: ReutersCIDRAP
Pennsylvania Total Measles Cases
PennLive reported state cases exceeded 1,250, while Pennsylvania health officials reported over 1,200 cases.
Over 1,250Press reportsSources: PennLiveThe Philadelphia Inquirer
Lancaster County Cases
Reported by LNP following the largest weekly case increase since September.
452Press reportsSources: LNP | LancasterOnline
Pennsylvania Outbreak Deaths
Pennsylvania state officials confirmed five deaths, while a Franklin County coroner reported a sixth death.
5 to 6OfficialSources: The Philadelphia InquirerCIDRAP

Who says what

WhoSaysDateSources
Centers for Disease Control and PreventionReported 4,410 confirmed measles cases nationwide and deployed personnel to assist Pennsylvania health officials.Sources: ReutersThe Philadelphia Inquirer
Pennsylvania Health OfficialsAccepted federal aid while criticizing the CDC for excluding Pennsylvania's confirmed deaths from national statistics.Sources: The Philadelphia Inquirer
Minnesota Department of HealthIdentified 25 measles cases across central and southeastern Minnesota.Sources: CBS News
Robert F. Kennedy Jr.Pledged to address the Pennsylvania measles outbreak and bring it to a quick close.Sources: Spectrum News

Summary

As of 16 October 2026, total US measles cases reached 4,410 following an 8% increase over one week [a02b7a889295d3e8, 945a51270d2101a9]. In Pennsylvania, reported cases have surpassed 1,250, with approximately one-third occurring in children [c472e4dfa2d43cae], and Lancaster County reaching 452 cases [46fe8514e2f3551f].

Pennsylvania state officials accepted federal assistance from the CDC while criticizing the agency for excluding state-recorded fatalities from national counts [57a390b96d7eb479]. State health officials confirmed five deaths linked to the Pennsylvania outbreak [57a390b96d7eb479], while a local county coroner previously reported a sixth measles-associated death in the state [c88ee4131fe489cd].

Timeline

  1. Laurel County health officials in Kentucky reported seven confirmed measles cases.
    Sources: Spectrum News
  2. Franklin County coroner reported a sixth measles-associated death in Pennsylvania.
    Sources: CIDRAPPittsburgh Post-Gazette
  3. Pennsylvania measles cases passed 1,200 as HHS confirmed CDC epidemiologist deployment to the state.
    Sources: The Philadelphia InquirerWGAL
  4. Minnesota Department of Health reported 25 cases in central and southeastern regions.
    Sources: CBS News
  5. CDC reported 4,410 total US measles cases, and Pennsylvania officials accepted federal assistance while confirming five state deaths.
    Sources: ReutersThe Philadelphia Inquirer

Still unknown

Reporting published on 17 Oct 2026

No reporting from listed outlets.