[On the role of the state of the upper respiratory tract in the etiology of poliomyelitis in children].
D002648:Child; D006801:Humans; D007830:Larynx; D009666:Nose; D011051:Poliomyelitis / Q000209:etiology*; D012141:Respiratory Tract Infections / Q000150:complications*; D014069:Tonsillitis / Q000150:complications*
POLIOMYELITIS/etiology; RESPIRATORY TRACT INFECTIONS/complications; TONSILLITIS/complications