Pacific NorthwestMODERATE RISK

Hantavirus in Washington

Comprehensive information about hantavirus cases, risk areas, and prevention resources for State of Washington.

51

Total Reported Cases

1993-2024

18

Deaths

Fatality Rate: 35.3%

Sin Nombre Virus

Primary Virus Strain

2024

Last Reported Case

Washington Hantavirus Map

Map showing Washington location. Endemic areas include: Eastern Washington, Central Washington, Okanogan County, Columbia Basin, Spokane rural areas.

High-Risk Areas in Washington

Eastern Washington
Central Washington
Okanogan County
Columbia Basin
Spokane rural areas

Primary Carrier: Deer Mouse (Peromyscus maniculatus)

Recent Outbreaks & Cases

20241 case(s)

Grant County

Case linked to agricultural building exposure

20232 case(s)

Yakima County

Cases associated with orchard work

Prevention Tips for Washington

Risk Level: moderate - Standard precautions recommended, especially in rural settings.

Be cautious in Eastern Washington agricultural areas
Properly ventilate seasonal farm structures
Use wet cleaning methods in outbuildings
Seal gaps in homes and farm buildings
Wear respiratory protection when cleaning rodent-infested areas

Washington Health Resources

Washington State Department of Health

Washington Poison Center

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View our interactive map and statistics dashboard for comprehensive hantavirus data.