title: Who: four ways to reduce hepatitis infections in people who inject drugs.
mesh_terms: D015658:HIV Infections / Q000517:prevention & control / Q000635:transmission; D006509:Hepatitis B / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission; D006526:Hepatitis C / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission; D006801:Humans; D018671:Needle-Exchange Programs / Q000458:organization & administration*; D015819:Substance Abuse, Intravenous / Q000453:epidemiology*; D014944:World Health Organization