polioviiruse tekitatud seljaaju nakkus­haigus, millele on iseloomulikud osaliselt püsivaks jäävad alfa­motoneuronite hävinemisest põhjustatud lihasehalvatused, an infectious disease especially of young children that is caused by the poliovirus, a highly infectious viral disease that may attack the central nervous system and is characterized by symptoms that range from a mild nonparalytic infection to total paralysis in a matter of hours, acute viral infectious disease of the nervous system that usually begins with general symptoms such as fever, headache, nausea, fatigue, and muscle pains and spasms and is sometimes followed by a more-serious and permanent paralysis of muscles in one or more limbs, the throat, or the chest