It is difficult to overstate the scale and challenges n terms of planning, costs, logistics, human resource, technical capacity, and the pervasive problems posed by stigma.

• 就规划成本、后勤、人力资源、技术及艾滋病羞耻所引起的普遍问题来看，其规模之大，问题之严重，无论如何强调都不过分。