West Nile, a sometimes-severe virus transmitted through bites from infected mosquitoes, is on the rise across the country.

Mosquito samples collected in six areas in Allegheny County have tested positive for West Nile Virus, according to the county ...

Mosquitoes carrying the West Nile virus have been identified in Oregon for the first time this year, according to the Oregon Health Authority.

Two mosquito samples collected in Hyde Park and West Roxbury tested positive for West Nile Virus— the first positive samples ...

On Friday evening, the Allegheny County Health Department announced that West Nile Virus had been found in mosquito samples ...