It is the first time this year that the virus has been detected in the state, public health officials announced.

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The Eastern equine encephalitis virus has been detected in mosquitoes in Massachusetts for the first time this year, state public health officials said Wednesday.

Colorado health officials said mosquitoes carrying the West Nile virus have been found in Adams, Boulder, Denver, Larimer and Weld counties.

Health officials point to the EPA’s list of approved repellents as the best defense against mosquitoes that spread West Nile.

The West Nile virus is spread to people through the bite of an infected mosquito, said Health Commissioner Joe Ebel. There ...