title: An old problem, a new threat.
authors: P
authors: P
authors: Holland
mesh_terms: D004352:Drug Resistance, Microbial; D004641:Emigration and Immigration; D006801:Humans; D011314:Preventive Health Services; D014376:Tuberculosis / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D014481:United States / Q000453:epidemiology