Why is caused by polio virus which belong to the family Picornaviridae Enterovirus Group 3 and there is 1 thai thai Siro, 2 and 3, each type may cause paralysis. Find thai 1, causing paralysis and caused outbreaks. ponds, except that other thai. When one type of infection, it is a permanent immunity occurs only on thai. There are no other thai resistance. According to the theory, and may have infected up to 3 times
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