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Polio (poliomyelitis) is a life-threatening highly contagious infection caused by poliovirus, an infection that may lead to permanent paralysis or weakness of various groups of muscles of the body especially in the limbs, in addition to other morbidities such as deep muscle pain, stiff neck, and sore throat.
After many years (15 to 40 years) some polio survivors may begin experiencing a set of new health problems decades after they recover from their initial poliovirus infection. This condition is known as post-polio syndrome, some may have only minor symptoms, while others develop more visible muscle weakness and a decrease in muscle size.
Unlike poliovirus, the post-polio syndrome does not spread among people. New problems that can arise may include Muscle weakness, Feeling tired (mental and physical fatigue), and Joint pain.