West Nile Virus: What's Happening in NYC?

New York City has seen its first human cases of West Nile virus in 2025. Two people from Queens have been affected, and the virus has also been found in blood donations from Brooklyn and Staten Island. However, these donors did not meet the criteria for a confirmed case. The virus is spread by mosquitoes, which are active in the city from May to October. It's been found in mosquitoes across all five boroughs since July, with the highest risk in August and September. The virus can be serious, especially for older adults and those with weakened immune systems. Health officials are advising New Yorkers to take precautions. They recommend using repellent and wearing long sleeves and pants during dawn and dusk. People with weakened immune systems are advised to avoid going outside during these times. Most people who get the virus don't have symptoms. But some may experience fever, headaches, muscle aches, rash, and extreme fatigue. One of the confirmed cases has been discharged from the hospital, while the other is currently hospitalized with encephalitis. The city is working to control the mosquito population. They are using spray operations and larviciding to reduce the number of infected mosquitoes. Spraying is scheduled for Monday through Wednesday in the Bronx, Manhattan, and Staten Island. Anyone who thinks they might have the virus should contact their healthcare provider. The city is also investigating more potential cases in Brooklyn and expects to have more information soon.