Infectious group. A study of 257 cases.
D002648:Child; D002675:Child, Preschool; D004165:Diphtheria / Q000150:complications; D005260:Female; D006801:Humans; D007223:Infant; D007251:Influenza, Human / Q000150:complications; D007827:Laryngitis / Q000209:etiology*; D008297:Male; D014777:Virus Diseases / Q000150:complications