BOSTON —

Two new human cases of West Nile virus have been confirmed in Massachusetts this year, the Massachusetts Department of Public Health said.

One case is in a woman in her 60s with exposure in Middlesex County, and the other is a man in his 50s with exposure in Suffolk County.

These cases bring the total number of confirmed human cases of West Nile virus in the state this season to eight. As a result, risk levels for West Nile virus have been elevated to high in Arlington, Chelsea, Medford and Waltham.

The first West Nile virus-positive mosquitoes in the state this year were announced on June 17. Since then, 445 mosquito samples have tested positive for West Nile virus so far this season from Barnstable, Berkshire, Bristol, Dukes, Essex, Franklin, Hampden, Middlesex, Norfolk, P

See Full Page