title: Reaction to tuberculin, susceptibility to diphtheria and immunity against smallpox among medical students over a decade.
mesh_terms: D000328:Adult; D001741:Black or African American; D004165:Diphtheria / Q000276:immunology*; D004219:District of Columbia; D005260:Female; D006801:Humans; D008297:Male; D012899:Smallpox / Q000276:immunology*; D013337:Students, Medical; D014374:Tuberculin Test; D014376:Tuberculosis / Q000276:immunology*