West Nile virus (WNV) is the primary cause of mosquito-borne disease in the whole of North America.  It is most commonly spread to people by the bite of an infected mosquito. Cases of the West Nile virus show during mosquito season, which starts from summer and continues through fall.

In West Nile virus symptoms usually not visible in most of the cases (8/10) and some causes fever, headache, body aches, joint pains, vomiting, diarrhea, or rash as well as affect CNS (central nervous system) nevertheless no vaccine for West Nile is available now and test of West Nile virus is done for confirmation.

Prevention

Mosquito bites in day and night so the best way to protect yourself is like insect repellent, wear long-sleeved shirts and pants, treat clothing and gear, and take steps to control mosquitoes indoors and outdoors.

Try to control mosquitoes out from working or living space.

West Nile virus is commonly spread by the bite of an infected mosquito and mosquitoes become infected when they eat infected birds. Infected mosquitoes then spread West Nile virus to people and other animals by biting them however it doesn’t spread through coughing, sneezing,  touching, or touching live animals.

For some details https://www.cdc.gov/ncezid/dvbd/media/westnilevirus.html