The number of human cases of West Nile virus in Massachusetts this season more than doubled to seven and public health officials designated Cambridge, Somerville, Watertown and Newton as being at high risk for the mosquito-borne disease.
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The number of human cases of West Nile virus in Massachusetts this season more than doubled to seven and public health officials designated Cambridge, Somerville, Watertown and Newton as being at high risk for the mosquito-borne disease.