Natural history of respiratory tract infection patterns in basically healthy individuals.
D000233:Adenoidectomy; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003120:Colorado; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011159:Population Surveillance; D012141:Respiratory Tract Infections / Q000453:epidemiology* / Q000235:genetics; D012621:Seasons; D012737:Sex Factors; D014068:Tonsillectomy