Friday is World AIDS Day. Doctors say the only way to stop the spread of the disease is to get tested.

Washington, D.C. is one of the areas hardest hit by HIV in the country.

The epidemic here is on par with some developing nations, according to the Kaiser Family Foundation.

But there's good news, the numbers are on a a decline.

In 2007, four D.C. residents were diagnosed with AIDS a day. In 2016, the number is less than one resident.

Why are we seeing the decrease?

Signs point to the District's needle exchange program that gets infected needles off the streets, the hundreds of thousands of free condoms that have been given out, and and the increasing use of preventative medication to stop the spread of the disease.

Experts say the most important thing you can do is get tested for HIV AIDS.

There are plenty of free resources.

Click here for more information about testing and other services provided.