The Rockland County Health department says a group of mosquitoes in Orangetown has tested positive for the Eastern Equine Encephalitis virus. No human cases of EEE have been reported. It’s a rare but potentially serious illness for humans that is transmitted by the bite of an infected mosquito. Most people bitten by an infected mosquito will not develop any symptoms, among them: headache, high fever, chills, vomiting and swelling of the brain. A vaccine is available and recommended for horses, but no vaccine exists for people, so avoid getting bitten by mosquitoes if you can.