⚠Situational awareness tool — not an operational trigger. Any mobilization requires direct WHO verification and validation through your institutional protocol.

HIGH RISK2025-DON561

Measles

📍 United States

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Confirmed cases

4,318

Deaths

Case fatality rate

0.1%

Cumulative cases since outbreak start — WHO DON bulletin dated 2026-06-04

Report date : 2026-06-04

Official report date — in isolated zones, field onset typically precedes this by days to weeks.

Region : americas

Ongoing measles resurgence — largest U.S. outbreak in 34 years; 4,318 cases (Jan 2025–Jun 2026) across multiple states, including three deaths.

Case trend

Focal Point GuidanceSTANDARD MONITORING

First actions

→Log in national surveillance system — continue routine monitoring
→Compare with seasonal baseline for this region and disease
→Include in weekly surveillance briefing — escalate if trend worsens (▲ cases or CFR)

Source: WHO DON↗

🔄Last checked by HealthWatch : 21h ago

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Cite this page (Vancouver)

HealthWatch Global. Measles outbreak — United States [Internet]. 2026-06-04 [cited 2026 Jun 26]. Available from: https://healthwatch-global.com/en/outbreak/7d519ce6-c281-4945-a2ef-ebead0600b67. Data source: WHO DON.

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