There are a variety of viral disease that attack the human nervous system and cause paralysis. One of the most famous of these is poliomyelitis, the virus of which is capable of destroying motor neurons and causes acute flaccid paralysis. Another example is an infection by West Nile Virus that can cause aseptic meningitis, encephalitis and flaccid paralysis.
A viral disease that causes paralysis by attacking the nervous system of the person is polio. Polio is a highly infectious disease that could result to paralysis if untreated or if the person is not immunized.