Poliomyelitis, often called polio or infantile paralysis, is an acute, viral, infectious disease spread from person to person, primarily via the fecal-oral route.   The term derives from the Greek poliós, meaning “grey”, myelós, referring to the “spinal cord”, and the suffix -itis, which denotes inflammation.

Polio patients suffering from respiratory paralysis in iron lungs during an epidemic in the early 1950s.

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