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05/13/26 Hantavirus exposure in King County residents
Situation There is an outbreak of Andes virus, a type of hantavirus, linked to the MV Hondius cruise ship. Three King County residents were potentially exposed. None of the exposed King County residents currently have symptoms of hantavirus. No other Washington residents have been reported as being exposed to Andes virus. Currently, no one in Washington…
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03/19/26 Provider Alert: Legionella cases increasing in Chelan County
Chelan-Douglas Health District continues to see higher-than-usual reports of Legionella disease in our community. Legionella is a waterborne bacterium that can cause a severe form of pneumonia and a milder flu-like illness. Early recognition and prompt reporting are critical to prevent additional cases and to aid in identifying environmental sources. Legionella must be reported to…
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03/16/26 Provider Alert: respiratory syncytial virus (RSV) season has been extended through April 30, 2026
The respiratory syncytial virus (RSV) season has been extended through April 30, 2026. Please continue to administer nirsevimab or clesrovimab to all eligible patients through April 30th. Current Situation RSV activity in Washington began later than usual this season, with emergency department visits in the state reaching the activity threshold in December 2025, compared to…