The document discusses the HIV/AIDS epidemic among injecting drug users in Indonesia and internationally. It provides three core interventions that can impact the epidemic: needle and syringe exchange, treatment for drug-related problems, and care, support and treatment for injecting drug users. The document also summarizes international experiences with harm reduction programs in Iran, China, and Brazil, noting their public health approaches, investments in addressing HIV/AIDS, and availability of antiretroviral therapy. Adherence to antiretroviral therapy among injecting drug users in Brazil was found to be similar to other international studies.