Since American scientists reported thefirst case of AIDS in 1981,the incidence ofthis disease has increased dramatically bygeometrical progression.According to theWHO statistics,up to 1 October 1991 therewere 418403 A...Since American scientists reported thefirst case of AIDS in 1981,the incidence ofthis disease has increased dramatically bygeometrical progression.According to theWHO statistics,up to 1 October 1991 therewere 418403 AIDS patients in the world.Asa matter of fact,far more victims have beeninfected with the Human展开更多
文摘Since American scientists reported thefirst case of AIDS in 1981,the incidence ofthis disease has increased dramatically bygeometrical progression.According to theWHO statistics,up to 1 October 1991 therewere 418403 AIDS patients in the world.Asa matter of fact,far more victims have beeninfected with the Human