Science magazine's Jon Cohen speaks with Jackie Judd of the Kaiser Family Foundation about preliminary science that may show why East Africans could be at a disadvantage when being treated for HIV. Read the full transcript below the video.

In two very different places - one the capital of United States, the other an impoverished nation in sub-Saharan Africa - children who lost their parents to the HIV/AIDS epidemic struggle against similar challenges. Here are two of their stories.

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