Disability days; United States. July 1963--June 1964.
D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011634:Public Health; D014481:United States