Post-polio syndrome occurs some decades after the original infection with polio.

Post-polio syndrome is a slowly progressing weakness that affects polio survivors decades after their initial bout with the disease.

Healthline - 2006 Post-Polio Syndrome was released on:

USA: 14 August 2007

Yes, post-polio syndrome occurs in individuals who have had polio typically 15-40 years after the initial infection. It is characterized by new muscle weakness or pain and can affect older patients who had polio earlier in life.

No. It is a set of neurologic symptoms which exist long after polio, itself, is experienced by the sufferer.