Overview of Eastern Equine Encephalitis

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**Key Points**  

- Eastern equine encephalitis is caused by a virus transmitted to humans via the bite of an infected mosquito.  

- It is a rare but serious illness.  

- Individuals in regions where the virus is present should take measures to prevent mosquito bites for protection.  

Eastern equine encephalitis virus is transmitted to humans through the bite of an infected mosquito. Each year, only a handful of cases are reported in the United States, primarily in eastern and Gulf Coast states. Although rare, the disease is severe, with around 30% mortality in severe cases, and many survivors face long-term neurological issues. Symptoms may include fever, headache, vomiting, diarrhea, seizures, behavioral changes, and drowsiness. Currently, there are no vaccines or treatments available for eastern equine encephalitis. Reducing your risk involves preventing mosquito bites.