AVERTing HIV and AIDS, based in the U.K., gives you the 411 on international efforts to combat HIV/AIDS. The site -- which has plenty of info about prevention, transmission, testing and treatment -- also features first-person accounts from around the world of people living with HIV.

The U.S. Department of Health and Human Services has lots of background information about National HIV Testing Day, as well as links to videos from national experts and leaders. Take action by downloading testing-day posters, and find out where to text your ZIP code for a testing center near you.

Planned Parenthood features a Q&A with Dr. Vanessa Cullins, the organization's vice president for medical affairs. The site also has plenty of info about HIV/AIDS, including symptoms, prevention and testing.

Brandee Sanders is an intern at The Root.

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