Study of the real stuation of HIV/AIDS in Hanoi in 2011 among target groups, the results show that: HIV infection is concentrated in group of injection drug users (IDUs) (67.7 percent), sexually transmitted infections (STI) (10.2 percent), prostitutes (1.71 percent). HIV infection is concentrated mainly between the ages of 20-29 (53.40 percent), 30-39 years (33.0 percent) and male dominated (72.2 percent).