Mosquito Season Arrives Early in DelCo

Delaware County Health Department has identified the first 2023 pool of mosquitoes that tested positive for West Nile Virus. West Nile Virus activity typically occurs during the summer months and into the fall.

Although no human cases have been reported to date, DCHD anticipates that the County will experience more frequent mosquito activity than usual in 2023 and potentially more cases of West Nile Virus. 

County Health Department Director Melissa Lyon said, “West Nile Virus spreads from mosquitoes to people and can cause serious disease, and although rare, can sometimes cause death. Using mosquito repellants and taking the proper precautions around your property is key to preventing mosquito bites, and potentially West Nile Virus.”

Most people infected with West Nile Virus do NOT develop any symptoms. Most people who develop symptoms of West Nile Virus recover completely, but fatigue and weakness can last for weeks or months. 

The most effective way to prevent the spread of West Nile Virus is to keep mosquitoes from breeding.

More information is available on the Delaware County Health Department West Nile Virus web page at

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