I've always assumed HIV to be extremely dangerous, so it's surprising to see the virus can be turned into a helper.
Researchers in France and the UK have used HIV to correct errors in DNA, helping a group of children live more pain-free lives. HIV is good at getting into cells, so the scientists modified it to help rather than harm once it gets inside the cells. It's like turning a burglar into a repair man.
I hope the children stay healthy so we can use this kind of treatment more.