title: New report validates needle-exchange programs. Programs slow spread of HIV without encouraging drug abuse.
mesh_terms: D015658:HIV Infections / Q000517:prevention & control*; D006801:Humans; D018671:Needle-Exchange Programs / Q000331:legislation & jurisprudence; D015397:Program Evaluation; D015819:Substance Abuse, Intravenous; D014481:United States