Dr Elmi Muller talks about HIV positive donors for HIV positive recipients and changing transplant practices around the world. Dr Muller is a general surgeon and is the head of the transplantation service at Groote Schuur Hospital in Cape Town, South Africa. She joined the Transplantation Research Immunology Group at the Nuffield Department of Surgical Sciences for three months until January 2016, having successfully secured a Newton International Exchange scheme award.