A stocky woman in blue jeans with spiky, gelled black hair dances on stage at one of Vietnam's rural rehabilitation centres, leading a hip-hop style chant.
"Hold hands together, we'll stop AIDS together," shouted the former heroin addict patient who returned to the rehabilitation centre to encourage over a thousand recovering drug users and prostitute inmates, a third of whom have HIV or AIDS.
People face stigma and discrimination when they leave the minimum security centres, especially if they are infected with HIV or have AIDS. HIV-infected people are often refused employment and their children denied schooling.
"Everybody should unite in combating this disease," said Danh Thu Hanh, 36, a former addict who spent two years as an inmate.