摘要：The epidemiological characteristics of HIV-1 infection in Africa have gradually been elucidated through various studies. The HIV-1 infection is believed to have existed in the 1960s in Africa and is presently epidemic in Africa. The HIV-I seropositive rate for the general population is higher in urban regions than in rural areas. The peak age of males infected with the HIV-1 tends to be higher than that of females infected with the HIV-1 Sex difference is recognized in the HIV-1 serpopositive rates. Heterosexual contact, mother-to-child transmission and contaminated blood transfusion are confirmed as the modes of HIV-1transmission. Prostitutes and STD patients are recognized as being high-risk groups for the HIV-1 infection. Where HIV-1 infection is widely distributed in the general population, risk reduction strategies should place strong emphasis on safe-sex techniques in addition to the promotion of partner reduction. J Epidemiol, 1995; 5 : 1-9.
