1. The baby girl was cured with standard anti-retroviral drugs.
When the baby was born in a Mississippi hospital in 2010, pediatric specialist Hannah Gay began treating her with three anti-retroviral drugs just 31 hours after she was born. This combination treatment has been around since the mid-1990s, and remains the biggest breakthrough in the fight against a disease that has claimed tens of millions of lives over the past few decades. As long as people keep taking the treatment cocktail, the virus remains virtually undetectable (a level of about 50 copies of the virus in a milliliter of blood).

But one of the things that makes HIV so heinous is that the virus can remain dormant in a person's DNA indefinitely.