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West Nile Virus (WNV) is the leading cause of mosquito-borne illness in the United States. Most people become infected through the bite of an infected mosquito. Most cases of WNV occur during mosquito season which begins in the summer and continues through fall.

Click here for more information on West Nile Virus.


For information on how to report a disease click here. For any questions, please contact the appropriate health authority by phone or review the website for additional information.

Carson City, Douglas and Lyon Counties
Carson City Health & Human Services (CCHHS)
(775) 887-2190

Clark County
Southern Nevada Health District (SNHD)
(702) 759-1300

Washoe County
Washoe County Health District (WCHD)
(775) 328-2447

All Other Counties
Nevada Division of Public and Behavioral Health (DPBH)
(775) 400-0333