Within the first half of this century, poliomyelitis was a frightening epidemic infectious disease found throughout the world. Severe paralytic afflictions of the central nervous system characterized the disease, hence the name poliomyelitis (polio = grey; myelos = marrow, spinal chord).The vast majority of infections, however, took an abortive course with no or only minor gastrointestinal symptoms. Thus, even in the largest outbreaks, clinically apparent poliomyelitis was not very prevalent: less than 1% of the infected persons developed the severe paralytic form of the disease. Still, the sight of the usually young and often severely crippled survivors made even small epidemics terrifying.
KeywordsInfected Monkey Poliomyelitis Virus Spinal Chord Infantile Paralysis Wild Type Poliovirus
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