December first is the day of AIDS in Taiwan. In 1984's end, the first AIDS case appeared in Taipei. Now, the number of AIDS case is running up to 2,927, and the number of people have caught HIV (a virus can cause AIDS) is running up to 13,517. Before condom universal to be use, gays are the major victim of HIV. But now, drug users become high risk group. They use the same syringe to inject drug. Exchanging blood is the way of HIV to catch people.