Philadelphia health officials are warning residents after West Nile virus was found in mosquitoes in Northeast Philadelphia earlier this month.

The city of Fort Collins announced on Thursday that there will be two days of mosquito spraying in the area due to “high levels” of West Nile virus.

County officials, who confirmed the infected mosquitoes on Sunday, say residents should do the following to protect themselves against exposure to the virus: Limit outdoor activities during dusk and ...