[Age difference in the clinical pictures of infectious diseases].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001424:Bacterial Infections / Q000175:diagnosis*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D014777:Virus Diseases / Q000175:diagnosis*