Nearly 3,900 measles cases mark worst year since 1991
Nearly 3,900 US measles cases in 2026 mark worst year since 1991; 20 percent hospitalization rate.
Event / Health
US Measles Outbreak 2026
Measles resurgence in the United States with emergency declarations and expanded vaccination authority, reaching nearly 3,900 cases in 2026, the worst year since 1991.
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2026-08-02 to 2026-10-30 · UTC publication dates
Coverage begins 26 Jul, 01:53 UTC
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2 alternative perspectives
Ohio measles outbreak grows to 210 cases near Pennsylvania border
Ohio measles outbreak reaches 210 cases as regional transmission continues amid declining vaccination coverage.
Pennsylvania measles outbreak surges past 1,000 cases, five deaths reported
Pennsylvania measles outbreak exceeds 1,000 cases with five deaths, largest outbreak in 30+ years.
Measles cases exceed 3,800, surpassing 1991 levels as vaccination immunity collapses
Measles cases exceed 3,800 in 2026 as vaccination rates collapse below herd immunity thresholds.
CDC measles death counts lag behind Pennsylvania's documented fatalities
CDC's official measles death tally excludes Pennsylvania's four documented fatalities, exposing surveillance reporting gaps.
Pennsylvania measles outbreak escalates to fourth death, 731 cases
Pennsylvania reports fourth measles death as state outbreak reaches 731 cases amid national crisis.
Pennsylvania declines CDC outbreak response support during measles crisis
Pennsylvania declined CDC epidemiological support during its measles outbreak with 676 cases and three deaths.
National measles caseload surges past 3,300 as Pennsylvania outbreak deepens
National measles cases exceed 3,300; Pennsylvania reports 676 cases with 124 hospitalizations.
Pennsylvania reports three measles deaths as CDC tally lags behind state counts
Pennsylvania's three confirmed measles deaths aren't yet reflected in CDC's official count.
Pennsylvania measles deaths surge to three as statewide cases exceed 676
Pennsylvania's measles outbreak reaches 676 cases with three deaths, including adult fatality.
Measles reaches highest national level in 35 years
US measles cases hit 35-year peak as vaccination coverage falls below immunity threshold.
Trump administration directs states to expand vaccine exemption policies
Trump administration requests states permit vaccine exemptions based on religious or personal beliefs.