Most people will not have any symptoms.
Some will develop flu-like symptoms such as fever, fatigue, sore throat, nausea, headache and stomachache, which may last for 2-5 days and go away on their own.
But in very few individuals, polio can cause serious symptoms, including paresthesia (pins-and-needles sensation in the legs), meningitis (infection of the covering of the brain and spinal cord), and rapid-onset paralysis of the arms, legs, or both.
Some infected children who were asymptomatic or had only mild illness can later on develop new-onset muscle weakness and even paralysis in adult life. This is called post-polio syndrome.