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Rockland County reports first human case of West Nile virus of 2025

West Nile virus is most commonly spread through the bite of an infected mosquito.

Bob Doda

Sep 30, 2025, 4:44 PM

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A Rockland County resident has contracted the county’s first case of West Nile virus of 2025.

A news release from the county did not detail who the patient is or their condition. West Nile virus is most commonly spread through the bite of an infected mosquito.

It says that there have been 26 human cases outside of New York City and 11 human cases in New York City since Sept. 20, according to a state report.

“While most mosquitoes do not carry disease-causing viruses, this case of West Nile virus reminds us of the importance of protecting ourselves from mosquito bites,” said Dr. Mary Leahy, the county’s health commissioner. “If you develop symptoms of West Nile virus, contact your healthcare provider immediately.”

What to know about West Nile virus:

  • Most people infected with West Nile virus do not develop symptoms.

  • Some individuals may experience mild illness with flu-like symptoms.

  • Severe illness can include high fever, headache, neck stiffness, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness, paralysis, or encephalitis (inflammation of the brain).

  • Less than 1% of people infected develop severe illness that affects the nervous system, requires hospitalization, or results in death.

  • The risk of severe illness increases with age and in individuals with underlying medical conditions such as cancer, diabetes, high blood pressure, kidney disease or a weakened immune system.

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