The document discusses lessons learned from implementing HIV programs in a coordinated "One UN" approach. Key points include: 1) UN agencies in the country established a Joint UN Team on AIDS and coordination structures like a joint support plan to deliver efforts as "One UN". 2) Challenges included slow implementation of the joint support plan, lack of data for monitoring, and inability to reallocate surplus funds between agencies. 3) Examples of successful "One UN" initiatives are provided, along with structures that helped or hindered coordination and lessons learned.