4 People In Massachusetts Have Contracted Eastern Equine Encephalitis, One Has Died

A rare disease typically associated with horses has so far infected four people in Massachusetts this month, one of whom has died.

Eastern Equine Encephalitis (EEE) is spread by mosquitos and can affect horses, humans, and birds. While the disease has “equine” in the name, birds are actually the most likely to contract the disease from a particular classification of mosquito. A different species of mosquito, however, is able to transmit the disease from birds to humans and several other mammal species. Horses do not appear able to spread the disease to humans, as their blood would not contain enough of the virus to infect mosquitos, which could then infect humans.