Seattle

Epidemiological Brief

Seattle's Santé signal reflects concurrent mpox activity and moderate influenza A(H3N2). Washington State reported 2 new mpox (clade II) cases in EW17 (16 YTD), yielding a normalized mpox signal of 66.7/100. Influenza A(H3N2) contributed 4,245 weekly cases against the 52-week peak of 15,854 (normalized 26.8/100), indicating waning but ongoing late-season transmission. Measles: 0 new Washington cases in EW18 (5 YTD); existing cases appear isolated. Hantavirus: 1 cumulative Washington case YTD but 0 new this week; background environmental risk persists near rodent habitats in the Puget Sound region. The composite Santé score is 23.6 (low). The mpox signal is notable: 2 new cases in EW17 against a national weekly peak of 3 represents a high relative rate. Seattle's LGBTQ+ event calendar surrounding the World Cup warrants active JYNNEOS vaccination outreach. Venue health teams should brief staff on mpox recognition. Hantavirus risk at outdoor venue perimeters warrants standard rodent-control precautions. Sante Index v0 is a watching signal, not a forecast.

Model v0 · Updated Jun 8, 2026