A woman has been diagnosed with West Nile virus in southern Bristol County, the state Department of Public Health announced Tuesday.
The woman, in her 60s, was one of three cases announced; the others are in Suffolk and Barnstable counties, and are both men in their 60s.
So far this year, 10 people in Massachusetts have been diagnosed with West Nile, a mosquito-borne disease that can cause mild to serious illness. Last year, there were six human cases.
In response to the diagnosis, MassDPH raised the risk level for West Nile virus to high in Acushnet, Dartmouth and New Bedford.
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