BOSTON —

The risk level for West Nile virus in Boston has been raised to high, the Boston Public Health Commission said Wednesday.

The risk level was raised due to ongoing evidence of mosquito samples in Boston carrying the virus. West Nile Virus is carried by mosquitoes and can be spread to humans through the bite of an infected mosquito.

There are currently no confirmed human cases of West Nile Virus among Boston residents, but BPHC strongly encourages residents to take steps to protect themselves.

When transmitted to humans through a bite, West Nile virus can cause fever, headache and nausea, and, in rare cases, serious illness.

Health officials say you should take precautions to avoid bites when outside.

Most people bitten by infected mosquitoes experience no symptoms, while ab

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