A mounting body of scientific evidence shows that where you live, your race and your socioeconomic status -- not just behaviors -- strongly correlate with HIV infection.

On the second anniversary of this country's first comprehensive National HIV/AIDS Strategy, it's worth thinking about what has gone right, and where we go next.

We've come a long way in the battle against HIV/AIDS. However, we must remain vigilant: We cannot ignore the startling statistics of new HIV infections of gay and bisexual men, especially among black and Hispanic men.

This year's World AIDS Day theme is "Getting to Zero: Zero new HIV infections. Zero discrimination. Zero AIDS-related deaths." We now have a clear path to get to zero.