Hans Rosling, co-founder of GapMinder Foundation, provides a good Ted Talk about HIV in the world. He does an excellent job of using data to highlight countries(not continents) that have the most serious problems. He also states some reasons why HIV/AIDS is not dropping off as quickly in some rich countries.
Here is a second Ted Talk by Hans Rosling. This one is a bit more entertaining, but it still contains excellent use of data. Hint: He shows why the washing machine is so important.