Complex sentence: Most of these treatments proved to be of little therapeutic value, however several effective supportive measures for the treatment of polio did emerge during these decades including the iron lung, an anti-polio antibody serum, and a treatment regimen developed by Sister Elizabeth Kenny.
Split into simpler sentences: Most of these treatments proved to be of little therapeutic value. However, several effective supportive measures for the treatment of polio did emerge during these decades, the iron lung, an anti-polio antibody serum, and a treatment regimen developed by Sister Elizabeth Kenny.