Eastern Equine Encephalitis (EEE) is a rare disease that is caused by a virus spread by infected mosquitoes.
Human cases of EEE disease are rare but can cause serious illness. Persons over age 50 and under age 15 seem to be at greatest risk for developing severe disease when infected with EEE. About 30% of people ill from EEE die and many who survive the infection are left with permanent neurologic damage. There are no vaccines to prevent EEE infection in people and no specific treatments for EEE disease.