title: The epidemiology of active tuberculosis in hospital employees in Ontario, 1966-1969.
mesh_terms: D000328:Adult; D001500:BCG Vaccine; D003428:Cross Infection / Q000453:epidemiology / Q000517:prevention & control; D005260:Female; D006801:Humans; D008297:Male; D008505:Medical Staff, Hospital; D008875:Middle Aged; D009741:Nursing Staff, Hospital; D009864:Ontario; D010564:Personnel, Hospital; D012008:Recurrence; D014374:Tuberculin Test; D014388:Tuberculosis, Lymph Node / Q000453:epidemiology / Q000517:prevention & control; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology* / Q000517:prevention & control
chemical_list: D001500:BCG Vaccine