Post-Polio Syndrome or Sequelae (PPS) is a condition that can strike polio survivors anywhere from 10 to 40 years after recovery from an initial attack of polio. PPS is characterized by a further weakening of the muscles that were previously injured by polio. PPS is usually a very slow progressing condition and often occurs after a physical or emotional trauma, illness or accident.

Polio, also known as poliomyelitis or infantile paralysis, is caused by three viruses that enter the mouth, grow in...