Michigan health officials say lab tests confirm that three people contracted Eastern equine encephalitis, a brain disease that is rare but deadly among humans.
The Michigan Department of Community Health said Monday that test results show two Kalamazoo County men and a Barry County woman were infected with the mosquito-borne disease.
A 61-year-old man is recovering at home, while a 41-year-old man remains hospitalized and a 52-year-old woman is in a rehabilitation center.
The state says about one-third of humans who get sick with the illness die when symptoms such as fever, chills and vomiting lead to seizures and coma.
Human cases of the virus are rare. Michigan's cases come amid an outbreak of the disease among horses.