Objectives. This paper analyzes data on the distribution of and risk f
actors for the acquired immunodeficiency syndrome (AIDS) and human imm
unodeficiency virus (HIV) infection in China. Methods. Ten years of da
ta on persons tested for HIV infection and AIDS and the proportion who
tested positive were analyzed against the background of China's popul
ation count. The Chinese- and English-language literature on HIV and A
IDS from 1985 through 1995 was also reviewed. Results. Overall, more m
ales than females had HIV infection. Intravenous drug use was the prim
ary source of transmission, followed by heterosexual contacts. Only a
small number of the persons tested were homosexual, but their proporti
on of Hn, seropositivity ranked third to that of drug users; that of g
eneral hospital patients ranked fourth. Conclusions. HIV infection and
AIDS in China began as a highly regionalized and largely rural proble
m in Yunnan Province. However, HIV infection and AIDS have become an e
merging urban problem. HIV seropositivity is low among several groups
thought to have an elevated risk.