How common is Eastern equine encephalitis in people?
EEE is transmitted by the bite of an infected mosquito. Mosquitoes become infected by feeding on infected birds. Infected mosquitoes will then occasionally feed on horses, humans and other mammals. Several species of mosquitoes can become infected with the EEE virus. The virus that causes EEE is spread only by mosquitoes. People and horses do not directly spread the disease to horses or people.
