The polio vaccine prevents an infection that can lead to paralysis or death. Learn who should get it and when, plus the risks ...

Polio, a highly contagious viral infection that ... The most common side effect is a sore arm after the shot. "The injected vaccine does not carry any significant side effects," Dr. Peter Salk ...

Stricken with polio in 1944, 2-year-old Mitch McConnell spent his days confined to bed or undergoing a strict physical therapy regimen to rehabilitate his left leg at an age when most toddlers ...