Eastern "equine" encephalitis in Massachusetts.
D000818:Animals; D009033:Culicidae; D004196:Disease Outbreaks / Q000453:epidemiology; D004199:Disease Vectors; D004683:Encephalomyelitis, Equine / Q000453:epidemiology / Q000517:prevention & control*; D006801:Humans; D007303:Insect Vectors; D008404:Massachusetts; D009032:Mosquito Control