Mosquitoes are often a nuisance, especially when weather grows hot and humid. More than a mere nuisance though, mosquitoes can create health hazards because of the diseases they often carry, including West Nile Virus.
West Nile Virus
West Nile Virus is transmitted to people and animals by infected mosquitoes. It is not possible to catch the West Nile Virus from another person or animal. It is only transmitted by mosquito bites. Moreover, only certain species of mosquitoes carry the virus and very few are actually infected.
Of those few people who are infected with the virus, most have very mild flu-like symptoms or no symptoms whatsoever. In rare cases, the disease can progress to the far more dangerous condition of encephalitis, which is the swelling of the brain.