The Health Department has found the West Nile virus in city mosquitoes for the first time this season.
The Health Department says infected mosquitoes were collected from the Douglaston and College Point neighborhoods in Queens and Old Town in Staten Island.
Additional traps have been set up in those areas and the city will continue its efforts to kill larvae.
While no human cases have been reported this season, the city is asking New Yorkers to use caution.
They advise residents to use bug spray, make sure windows have screens, clear standing water from property, clean and chlorinate swimming pools and to make sure gutters are clean and draining properly.
Symptoms of West Nile Virus resemble those of the flu. They include headache, fever, weakness, and sometimes a rash.