Piot, P., Bartos, M., Ghys, P. D., Walker, N., & Schwartländer, B. (2001, April 19). The global impact of HIV/AIDS. Retrieved March 20, 2018, from https://www.nature.com/articles/35073639
I think this source is useful because it provides in-depth information about the impact of HIV/AIDS in specific regions around the world and also focuses on the United States.