How often should TB tests be given, and who should authorize them?
D000368:Aged; D002487:Centers for Disease Control and Prevention, U.S.; D003955:Diagnostic Tests, Routine / Q000592:standards*; D017408:Guidelines as Topic; D006707:Homes for the Aged / Q000331:legislation & jurisprudence*; D006801:Humans; D014374:Tuberculin Test / Q000592:standards*; D014376:Tuberculosis / Q000175:diagnosis / Q000517:prevention & control*; D014481:United States