Understanding the Symptoms and Progression of Polio Polio is a complex and variable disease with distinct phases in its progression. These phases include the prodrome, the period preceding paralysis, the paralysis period, the recovery period, and the residual phase, each with different symptoms. Prodrome Phase The symptoms during this phase are mild and resemble nonspecific infection signs. People may experience fever, general malaise, lack of appetite, excessive sweating, sore throat, cough, and runny nose. Additionally, gastrointestinal symptoms like nausea, vomiting, abdominal pain, and diarrhea may occur. These symptoms typically last from 1 to 4 days, and if the condition improves... Learn more