Truvada is the first drug approved by the FDA for the prevention of HIV infection. Known as PrEP (short for pre-exposure prophylaxis), this treatment is meant to be employed alongside other risk-reduction measures, such as safer sex and regular HIV testing; however, it has caused some controversy, both among medical experts and in communities of men who sleep with men—the group hardest hit by HIV in the United States.

Here’s a look at some of the numbers (for the full story, read "Truvada for PrEP: Experts Weigh In on the Newest Way to Prevent HIV/AIDS").

truvada healthline infographic