The first mosquitoes to test positive for West Nile virus this year in Boston have been detected, health officials announced Friday.

The virus was identified at a mosquito pool in Jamaica Plain, according to the Boston Public Health Commission. No Massachusetts residents have tested positive for West Nile virus this year.

“It is typical to find West Nile Virus in Boston at this time of year due to the periods of hot weather,” BPHC Medical Director Jennifer Lo said. “This does not mean the average person is at increased risk of getting [West Nile virus]. However, people should still take simple precautions to avoid mosquito bites.”