FURTHER studies of geographic variation in naturally acquired tuberculin sensitivity.
D000818:Animals; D002417:Cattle; D002648:Child; D006801:Humans; D009285:Naphthoquinones; D015995:Prevalence; D035583:Rare Diseases; D014373:Tuberculin; D014374:Tuberculin Test; D014376:Tuberculosis
D009285:Naphthoquinones; D014373:Tuberculin