Today in Public Health
SignificantHigh confidenceHuman

U.S. measles outbreaks surpass the full-year 2025 case total

CDC reports 3,471 confirmed measles cases through September 17, compared with 2,289 during all of 2025. Forty-seven jurisdictions have reported resident cases, and 3,296 cases are associated with outbreaks. Activity is clustered and should not be portrayed as uniform transmission throughout the country.

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Location
United States
National representative point
First seen
January 1, 2026
Last verified
September 22, 2026

Markers use representative points at the country or regional level, not exact incident locations. Placement indicates the affected area, not a precise site.

What changed since the prior scan

Newly added as a correction to prior scans.

History

  1. First seen (source)

    First reported by the primary source. External event date, not a TiPH publication date.

  2. Added to the desk

    Added to the Global Signal Desk in the September 22 scan.

Primary sources

Who works on this?

Events like this are answered by teams across public health. These are real profession types that respond to this kind of event — not people assigned to it.

  • Epidemiologist

    Tracks how and where disease spreads and estimates risk to populations.

  • Immunization program manager

    Plans and runs vaccination campaigns and monitors coverage.

  • Public health nurse

    Delivers frontline prevention, screening, and community care.

  • Vaccine cold-chain logistician

    Keeps vaccines viable from manufacture to the point of care.

  • Health communication specialist

    Turns technical findings into clear, trustworthy public guidance.

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Corrections & updates

This record is reverified against its primary sources on a twice-daily scan. When the evidence changes, the record changes and the change is logged in the review record — including signals we remove. This is situational awareness, not clinical or travel advice.

Review recordResolved archiveHow the desk decides

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