Why polio virus infection, which is caused by
belong in the family Picornaviridae Enterovirus group Serotype 3, and there is a Type 1, 2 and 3, each type may cause paralysis. Find type 1 causes 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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