New York City has reported its first human cases of West Nile virus this year, raising concerns as mosquito activity peaks across the five boroughs. Health officials on Friday confirmed that two residents of Queens were diagnosed with the infection.

Two Queens residents have tested positive for West Nile virus, New York City health officials announced Friday. One patient was diagnosed with West Nile neuroinvasive disease and is currently hospitalized with a brain infection. The other was briefly hospitalized with West Nile fever and has since been released.

Solano County health officials have issued tips for reducing the risk of mosquito bites after West Nile virus was detected in a bird in Benicia.