The unofficial start of summer also means the beginning of mosquito season.

New York City is doing its part to prevent the risk of West Nile virus that could occur after being bitten by a mosquito.

The first round of aerial pesticide spraying will be occurring between today and Thursday over “non-residential mosquito breeding grounds” in the boroughs.

West Nile virus was first discovered in Queens in 1999, and it can be dangerous for infants, elderly people and fetuses.

Eight cases and one death were reported by the Centers for Disease Control and Prevention in New York in 2020.

According to the health department, the areas being sprayed include Pelham Bay North and Pelham Bay Park South in the Bronx, and Marine Park and Fresh Creek Park in Brooklyn.

The spraying is expected to happen between 6 a.m. and 7 p.m. depending on the weather.

The city says it plans to do other sprayings throughout the season, but warn that the insects can still breed in any standing water that’s been around for up to five days in hot weather.

Anyone who sees pools of standing water can report it to officials by calling 311.