 In 2005, sexual transmission accounted for 50% of all new infections, and by 2007, a majority of HIV/AIDS cases overall were related to sexual transmission pathways.Currently, major high-risk groups for HIV infection include intravenous drug users, men who have sex with men (MSM), and sex workers.The Chinese government has additionally established data collection and monitoring sites targeting male migrant workers, long-distance truck drivers, male STI clinic patients, antenatal care clinic patients, and college students.