It marks the first time HIV has been essentially eradicated in a child, making her just the second person ever said to be cured of HIV.
Doctors at a Mississippi hospital say they gave the girl an especially intensive three-drug regimen within 30 hours of birth, tests had previously confirmed she was infected and wasn't merely at higher risk from her mother.
What might this mean for more than 300,000 babies born with HIV each year, mostly in Africa.