UK detects West Nile virus for 1st time in mosquitoes

West Nile virus has been detected in mosquitoes in UK for the first time, the country's Health Security Agency said. It is a vector borne disease usually found in birds that typically circulates through bird-biting mosquitoes. In rare cases, mosquitoes can transmit the virus to humans. It causes life-threatening illness in about one in 150 people who're infected, says WHO.