Polio is a highly infectious disease caused by a virus that affects the nervous system. It was a fairly common illness in the United States until the advent of the Polio vaccine that eventually lead to the eradication of the disease in the U.S..Polio is still found in certain areas of Africa and South East Asia. A Polio booster vaccine is often recommended for these locations.Symptoms of Polio can sometimes be mild and include fever, fatigue, nausea, and headache. Approximately 1% of individuals infected with polio will have permanent paralysis or weakness of the limbs (4)