Acute respiratory infections in Beijing children. Epidemiological studies at Dongguan Brigade.
D000208:Acute Disease; D002648:Child; D002675:Child, Preschool; D002681:China; D003139:Common Cold / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011014:Pneumonia / Q000453:epidemiology; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D012424:Rural Population