title: CDC clarifies when to retest staff shown positive by Aplisol TB test.
mesh_terms: D002487:Centers for Disease Control and Prevention, U.S.; D006801:Humans; D007538:Isoniazid / Q000627:therapeutic use; D010564:Personnel, Hospital; D014374:Tuberculin Test / Q000592:standards*; D014376:Tuberculosis / Q000188:drug therapy / Q000517:prevention & control; D014481:United States