Polio can have a better prognosis after active treatment, but may leave sequelae such as paralysis. Poliomyelitis, often referred to as poliomyelitis, is a highly contagious disease caused by the poliovirus, and is mainly found in children under 5 years of age. Polio virus often invades the nervous system, resulting in delayed paralysis of varying severity, and in severe cases, death can be caused by respiratory muscle paralysis, requiring prompt treatment. Most patients have a favorable prognosis after active treatment. As there is no effective treatment for polio to delay or prevent the onset of paralysis, some patients with paralytic or severe disease may be left with sequelae such as paralysis. If children feel unwell, it is recommended that they seek prompt medical attention and early diagnosis and treatment to avoid delays.