What causes poliomyelitis?

Poliomyelitis — the serious infection which in the XXI century meets very seldom, but still constitutes potential danger. We understand that causes this illness, than it is dangerous and how to be protected from infection. Poliomyelitis — this viral infectious disease which affects mainly nerves of a spinal cord or a brain trunk. At the majority of people infection proceeds imperceptibly, only at every fourth infection is accompanied by the symptoms reminding flu. Thus paralysis which can lead, including to death because of develops in 1 of 200 cases of infection...