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4h ago

West Nile Virus Activity Intensifies With NYC’s First Human Cases and Maryland’s First of the Year

Health officials escalate spraying during the August–September peak.

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West Nile virus can be transmitted by mosquitoes, but people can reduce the risk of infection.
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Overview

  • New York City reported two infections in Queens, including one hospitalization for encephalitis, with 988 positive mosquito pools citywide and spray operations scheduled Aug. 25–27 in the Bronx, Manhattan and Staten Island.
  • The virus was detected in blood donations from residents of Brooklyn and Staten Island, and two additional possible cases in Brooklyn are under investigation.
  • Kansas is tracking six infections as of Aug. 15, five classified as neuroinvasive, with officials noting totals remain below 2023 levels.
  • Maryland confirmed its first human infection of 2025 in Central Maryland, and health officials say the patient is recovering.
  • Local surveillance found infected mosquitoes or birds in Solano County, California, Naperville, Illinois, and Chatham County, Georgia, prompting targeted spraying and catch-basin treatments.