Acute flaccid paralysis is called AFP cases, the main symptoms are, acute onset, decreased muscle tone, muscle strength, decreased tendon reflexes or completely disappeared, polio, polyneuropathy, traumatic neuritis and other diseases, all have acute flaccid paralysis symptoms, if children under 15 years of age children with this paralysis symptoms, collectively diagnosed as polio, that is, poliomyelitis, the general diagnosis is based on the onset of 60 days later still have paralysis, poliovirus isolated from the feces, etc.