“Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus.  The virus spreads from per son to person and can infect a person’s spinal cord, causing paralysis (can’t move parts of the body). Most people who get infected with poliovirus (about 72 out of 100) will not have any visible symptoms.  About 1 out of 4 people (or 25 out of 100) with poliovirus infection will have flu-like symptoms.  A smaller proportion of people (much less than one out of 100, or 1-5 out of 1000) with poliovirus infection will develop other, more serious symptoms that affect the brain and spinal cord.  This would include Paresthesia (feeling of pins and needles in the legs), others with Meningitis (infection of the covering of the spinal cord and/or brain) occurs in about 1 out of 25 people with poliovirus infection to Paralysis=the worst symptom (can’t move parts of the body) or weakness in the arms, legs, or both, occurs in about 1 out of 200 people with poliovirus infectionl.”

CDC Centers for Disease Control and Prevention