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Vaccine associated paralytic poliomyelitis is defined as those cases of acute flaccid paralysis:

AWho have residual weakness 6 months after the onset of paralysis and from whose stool samples, vaccine related poliovirus but no wild virus is isolated.
BWho have residual weakness 60 days after the onset of paralysis and from whose stool samples, vaccine related poliovirus but no wild virus is isolated. (Correct Answer)
CWho have residual weakness 6 days after the onset of paralysis and from whose stool samples, vaccine related poliovirus but no wild virus is isolated.
DWho have residual weakness 60 days after the onset of paralysis and from whose stool samples, wild polio virus is isolated.