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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    West Nile Virus Cases, 2006-present

    Metadata Updated: January 23, 2026

    This dataset contains positive cases of West Nile virus found in humans by county of residence, 2006-present. Humans usually become infected with West Nile virus by being bitten by an infected mosquito. Viruses carried in the mosquito’s saliva enter the blood stream and local tissues where they infect immune cells. Most of the people who do become sick during a WNV infection develop what is referred to as “West Nile fever.” A small percentage of people will develop a much more serious illness called West Nile neuroinvasive disease (WNND). Positive cases in this dataset include both West Nile fever and West Nile neuroinvasive disease.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date October 23, 2025
    Metadata Updated Date January 23, 2026

    Metadata Source

    Harvested from State of California

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date October 23, 2025
    Metadata Updated Date January 23, 2026
    Publisher California Department of Public Health
    Maintainer
    Identifier ee99bc21-924a-4272-863f-7ce74d19cba8
    Data First Published 2017-06-16T22:21:50.608488
    Data Last Modified 2026-01-12T22:10:29.828013
    Category Health and Human Services
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id f4afe87d-6a3a-499a-a7ba-256ef7f6fa52
    Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
    Harvest Source Title State of California
    License http://www.opendefinition.org/licenses/cc-by
    Source Datajson Identifier True
    Source Hash f3142f405ec1cd102e0183d8029a0fff3def1f8807f37da776c1ce1f035f476d
    Source Schema Version 1.1

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