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Vector-Borne Disease Activity in the County

The District monitors vector-borne disease activity - including West Nile Virus, dengue and flea-borne typhus - throughout the county and updates this page as necessary. 

West Nile Virus Activity

* Most recent updated West Nile Virus activity map

WNV Data for 2025

WNV Data for 2024WNV Data for 2023

 

Flea-Borne Typhus

* Most recent updated West Nile Virus activity map

Flea-Borne Typhus Data for 2025