Electrocardiographic Changes in Poliomyelitis, 1947 and 1949 ... Nonbacterial pneumonitis of unknown etiology was present in this case. The findings in those who died with pulmonary edema have ...

But very rarely — about 1 in 2.7 million OPV doses — the virus can spread from the gastrointestinal (GI) tract to the spinal cord, where it causes paralysis. Before [the vaccine], polio was ...