Experience in other countries shows that when HIV begins to spread among drug users, because carriers can spread the virus through the two channels of sex and shared needles, the disease not only spreads more quickly, but also spreads further into the heterosexual population, which in turn means a rapid increase in the number of infected women and AIDS babies.
國外經驗顯示，當愛滋開始在毒癮患者中蔓延，由於帶原者可能同時以性交和共用針具兩種管道傳播病毒，不僅將加快傳播速率，更可能讓女性感染者和愛滋寶寶數目快速增加。