The 2012 Integrated Behavior and Biological Surveillance of HIV, Sexually Transmitted Infections and Associated Risk Behaviors

HIV surveillance applies a repeated survey method, and the 28th round was conducted in 2010. Collected data were used to compare with those from the previous rounds to monitor changes of HIV prevalence. Data were collected from IDU rehabilitation clinics of general hospitals, provincial hospitals, and drug rehabilitation centers by collecting all visited IDU cases in June. If the sample size is less than 10, data collection will be extended until the 15th of July. Data from the provinces of more than 20 samples will be used to calculate the median of HIV infection at the national level.