Polio is a very contagious viral disease caused by the poliovirus. It can cause permanent disability and even death, especially in children under the age of five. There are two types of polio present in the world today: Wild poliovirus and vaccine-derived poliovirus.
What are the symptoms? Most people infected with polio are asymptomatic. Around one in four people experience flu-like symptoms, such as a sore throat, fever, headaches or stomach pain. Generally, these symptoms go away on their own after two to five days.
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