Karen is a Senior Research Fellow in the Institute for Global Health at UCL. She is a medical sociologist and qualitative researcher with research interests in the use of HIV treatment for prevention, personal engagements with digital technologies for HIV self-management, and constructions of identity through HIV bio- and digital technologies. She works with Jo Gibbs on the i-sense Exploratory Project, i-SHOP, developing and testing a user-centred online pathway and prototype app for HIV self-testing and linkage to care and prevention. She received her PhD in Sociology from the University of California, San Francisco, where her doctoral research explored how discourses about HIV treatment as prevention have emerged within the social worlds of HIV professionals. She was previously a postdoctoral researcher at the University of Reading School of Pharmacy and worked as a research assistant during her PhD at the Center for AIDS Prevention Studies (CAPS) at UCSF.