Eastern Equine Encephalitis

Magnified image of a mosquito

EEE virus:

Spread to people by infected mosquitoes

EEE virus is a rare cause of brain infections (encephalitis). Only a few cases are reported in the United States each year. Most occur in eastern or Gulf Coast states. Approximately 30% of people with EEE die and many survivors have ongoing neurologic problems.

As of December 3, 2019, CDC has received reports of 37 confirmed cases of Eastern equine encephalitis virus disease for this year, including 15 deaths. Cases have been reported from the following nine states: Alabama (1), Connecticut (4), Indiana (1), Massachusetts (12), Michigan (10), North Carolina (1), New Jersey (4), Rhode Island (3), and Tennessee (1).