35 million people worldwide have HIV/AIDS. Do something about it on December 1.

Each mark on this chalkboard represents an AIDS-related death. (© AP Images)

What do 35 million people worldwide have in common? An HIV-positive diagnosis. What they don’t have in common is equal access to treatment.

To close the treatment gap we must:

  • Get medications to those who need them. Only 24 percent of HIV-afflicted children currently have access to lifesaving antiretroviral treatments.

  • Get everyone tested. An estimated 19 million people have HIV and don’t know it.

  • Get the facts about HIV transmission and prevention so you can take care of your own health and encourage others to take care of their health too.

More than 39 million people have died from an AIDS-related illness, in one of the deadliest epidemics in history. And AIDS remains the leading cause of death among women of reproductive age.

Last year almost 60% of all new HIV infections among young people aged 15–24 occurred among adolescent girls and young women.

December 1 is World AIDS Day. Looking for ways to take action? Start by testing your knowledge with this quiz and sharing it with others. Use the hashtag #WAD2014 to continue the conversation on Twitter. Tune in to the White House live event on December 1 from 12:00 to 14:00 EST (17:00–19:00 UTC).