The city is again planning to spray for mosquitoes, this time in west Fort Collins, where West Nile virus activity remains high.

Fort Collins plans mosquito spraying on August 21 due to West Nile virus risk, advising residents to stay indoors.

West Nile virus (WNV) has been the dominant cause of mosquito-borne illness in the United States since its introduction into North America in 1999. There are no vaccines nor medications to prevent or treat illness in people,

An American crow in Walnut Creek was found to be the second bird infected with West Nile Virus, according to the Contra Costa Mosquito and Vector Control District.

Two more cases of West Nile Virus in northwest Pennsylvania were reported Monday evening, one of them in Crawford County and the other in Mercer County. The Mercer County Conservation District said a second case of the virus was found in Crawford County in the Cochranton area,