As of 28 February 2009, 16,977 HIV-infected people (which excluded 687 HIV-positive foreigners diagnosed in the country) had been identified in Taiwan; of that number 5,338 had developed AIDS and 2,250 had died (Taiwan CDC 2009). Based on 2003 data, the ratio between the estimated number of adult (age 15-49) infections and the number of reported infected persons was 2.4:1 (Huang et al. 2005) . Hence, as of February 2009, Taiwan had an estimated 40,000 cases of HIV/AIDS out of a population of 23 million.