Our friends over at the Stigma Project, a small organization that releases social media–friendly messages around HIV, has definitely had a big impact (more than 3 million people around the world have seen at least one of its images). Now the group is hosting its first official fundraiser this month in Los Angeles (get tickets or donate here), and so we're looking back at its success so far.
Stigma Project graphics consistently go viral on social media outlets, thanks to a strategy that blend new media and pop culture. Just how viral? Here are its 20 most successful ads and the number of Facebook users each as reached:

1. Cheat Sheet #1: HIV vs. AIDS
Campaign: HIV Talk
Reached: 437,094

2. We’re Not in 1984 Anymore, Toto
Campaign: Live HIV Neutral
Reached: 361,901

3. Cheat Sheet #2: HIV Disclosure Etiquette
Campaign: HIV Talk
Reached: 324,331

4. Stand Strong With Sharp
Campaign: N/A
Reached: 252,195

5. I Am HIV Neutral
Campaign: Live HIV Neutral
Reached: 183,963

6. Cheat Sheet #3: Dating Profiles & HIV
Campaign: HIV Talk
Reached: 178,958

7. Think Different
Campaign: Think Different
Reached: 114, 950

8. I Am HIV Positive
Campaign: Live HIV Neutral
Reached: 108,147

9. 44 Percent of Gay or Bisexual Men (Bubble Pop)
Campaign: N/A
Reached: 99,718

10. Keep Calm and Talk About HIV
Campaign: HIV Talk
Reached: 82,047

11. Mr. Clean & Positive
Campaign: World War: HIV
Reached: 79,104

12. Remove the Elephant
Campaign: Live HIV Neutral
Reached: 57,458

13. Elephant Removal Required
Campaign: HIV Talk
Reached: 43,634

14. Full Blown
Campaign: HIV Talk
Reached: 42,938

15. Evolve
Campaign: Live HIV Neutral
Reached: 41,947

16. HIV Today (Infographic)
Campaign: N/A
Reached: 39,426

17. PARTNER Study Progress Report (Infographic)
Campaign: N/A
Reached: 37,993

18. Kiss Me, I’m Positive
Campaign: Live HIV Neutral
Reached: 37,745

19. HIV Talk
Campaign: HIV Talk
Reached: 28,185

20. Got PrEP?
Campaign: Think Different
Reached: 27,279