Post-polio syndrome, also known as PPS, is a condition that affects individuals who have previously contracted polio. The syndrome typically manifests years after a person has experienced the initial polio infection. Symptoms of PPS can include muscle weakness, fatigue, and pain. There are a few alternative terms that can be used to describe this syndrome, including late effects of polio, post-polio sequelae, and post-polio residual paralysis. These terms all capture the idea that PPS is a condition that arises from a previous polio infection, and that it can involve a range of physical symptoms that can persist over time.