A new AIDS study, published Oct. 22 in the journal, Nature Medicine, describes how a unique change in the outer covering of the virus found in two HIV infected South African women enabled them to make potent antibodies which are able to kill up to 88% of HIV types from around the world. The ground-breaking discovery suggests an important new approach that could be useful in making an AIDS vaccine. The study, performed by members of the Centre for the Aids Programme of Research in So