HIV prevalence tends to decrease in high-risk populations and low-risk populations. Prevention and intervention programs effectively reduce HIV prevalence and risk behavior and increase preventive behavior among populations.
HIV epidemic in Viet Nam is still in HIV concentrated epidemic: High HIV prevalence among people who inject drugs (PWID), female sex workers (FSW), and men who have sex with men (MSM) and low HIV prevalence among pregnant women and military recruits. HIV prevalence tends to decrease in high-risk populations and low-risk populations. Prevention and intervention programs effectively reduce HIV prevalence and risk behavior and increase preventive behavior among populations.