In response to the health and social harms of illegal drugs, a large international drug prohibition regime has been developed under the umbrella of the United Nations.1 Decades of research provide a comprehensive assessment of the impacts of the global “War on Drugs” and, as thousands of individuals gather in Vienna at the XVIII International AIDS Conference, the international scientific community calls for an acknowledgement of the limits and harms of drug prohibition, and for drug policy reform to remove barriers to effective HIV prevention, treatment and care.

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old zack