There are many reasons for these positive developments, but one of the most remarkable is in the increase in the number of people around the world on anti-retroviral therapy, the medicines they need to keep their HIV in check.
有很多原因促进这个发展， 其中一个最引人注目的 是越来越多人开始接受 抗转录病毒疗法， 这个疗法可以有效抑制爱滋病毒发作。