Unions praise TB guidelines.
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D006801:Humans; D017053:Infection Control; D007750:Labor Unions; D008397:Masks; D009314:National Institute for Occupational Safety and Health, U.S.; D016272:Occupational Health; D010564:Personnel, Hospital / Q000592:standards*; D014376:Tuberculosis / Q000517:prevention & control*; D014481:United States