This edited collection brings together the social dimensions of three key aspects of recent biomedical advance in HIV research: Treatment as Prevention (TasP), new technologies such as Pre-Exposure Prophylaxis (PrEP), and the Undetectable equals Untransmittable (U=U) movement. The growth of new forms of biomedical HIV prevention has created hope for the future, signalling the possibility of a world without AIDS. In this context, the volume discusses the profound social, political and ethical dilemmas raised by such advances, which are to do with readiness, access, equity and availability. It examines how HIV prevention has been, and is, re-framed in policy, practice and research, and asks: How best can new biomedical technologies be made available in a profoundly unequal world? What new understandings of responsibility and risk will emerge as HIV becomes a more manageable condition? What new forms of blame will emerge in a context where the technologies to prevent HIV exist, but are not always used? How best can we balance public health’s concern for adherence and compliance with the rights of individuals to decide on what is best for themselves and others? Few of these questions have thus far received serious consideration in the academic literature. The editors, all leaders in the social aspects of HIV, have brought together an innovative and international collection of essays by top thinkers and practitioners in the field of HIV. This book is an important resource for academics and professionals interested in HIV research. Chapters "Anticipating Policy, Orienting Services, Celebrating Provision: Reflecting on Scotland’s PrEP Journey" and "How the science of HIV treatment-as-prevention restructured PEPFAR’s strategy: The case for scaling up ART in ‘epidemic control’ countries" are available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.