Acute flaccid paralysis (AFP) is a general term for "acute flaccid paralysis of the extremities" and is a concept proposed to prove that polio has been eradicated in the region due to undetected poliovirus in stool samples. Polio-like palsy associated with enterovirus A71 has been reported since 1997 and that with enterovirus D68 since 2013. Acute flaccid myelitis (AFM) has been proposed to avoid confusion with AFP. This review outlines AFP and AFM.