RESEARCH PROGRAM EFFECTIVELY TREAD OPIADDICTION BY METHADONE PREVENTION OF HIV INFECTION AMONG INJECTING DRUG IN HA DONG AND TRI LIEM, HANOI 2012 - 2013 Research is proceed 400 and 362 men (before and after the intervention) from 18 years and above, injection of drugs intravenously in 1 months, living in Hanoi, to assess the effectiveness of treatment programs for opiate addicts with methadone prevention of HIV infection among injecting drug users in Ha Dong District and Tu Liem District, Hanoi city 2011 - 2013.