While rare, the rate of the Powassan virus is increasing and can cause severe disease, including inflammation of the brain and spinal cord.

A Boston baby is hospitalized with seizures and brain damage after a tick bite on Martha's Vineyard may have led to Powassan virus, which transmits faster than Lyme disease.

A baby from Martha's Vineyard, Massachusetts is fighting for her life after contracting a suspected case of the tick-borne Powassan virus.