“Polioviruses are transient inhabitants of the gastrointestinal tract. Up to 95% of all polio infections are completely asymptomatic. Approximately 5% of polio infections consist of a minor, nonspecific illness consisting of an upper respiratory tract infection (sore throat and fever) and gastrointestinal disturbances (nausea, vomiting, abdominal pain, and diarrhea). This influenza-like illness, clinically indistinguishable from the myriad of other viral illnesses, is characterized by complete recovery in less than a week with resultant life time immunity. Less than 1% of all polio infections result in paralysis. Most importantly, the vast majority of individuals who contract paralytic poliomyelitis recover with complete—or near complete—return of muscle function. Any weakness that is still present 12 months after onset of paralysis is usually considered permanent.“
Posted on: Wed, 03 Jul 2013 13:56:03 +0000
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