Until now, AbbVie has not participated in the scheme, although the MPP has signed HIV drug agreements with Bristol-Myers Squibb, Gilead Sciences, Roche and ViiV Healthcare, which is majority-owned by GlaxoSmithKline.
Despite major advances in treating HIV/AIDS, only a quarter of the 3.2 million children with the virus - 90 percent of whom live in sub-Saharan Africa - currently receive drugs.
One major obstacle is the fact that existing syrup-based formulations need refrigeration, making them unsuitable for much of Africa, and their unpleasant taste is an added problem.
The licensing agreement for AbbVie's lopinavir and ritonavir drugs, both of which are specifically recommended for children, gives a green light to other players to develop improved treatment options.
The license also allows for the development of fixed-dose combinations using different drugs already covered by MPP deals with other companies.