Roger Paredes obtained a degree and doctorate in Medicine and Surgery from the Autonomous University of Barcelona (UAB). He specialised in HIV resistance, at Brigham & Women's Hospital in Boston and Harvard Medical School, being funded by a post-doctoral scholarship from “la Caixa”. His team has demonstrated the clinical utility of new methods of sequencing HIV in both high- and low-income countries. He is a member of the WHO HIV Drug Resistance Strategy (ResNet) Steering Committee and of the International Antiviral Society-USA, which publishes an international annual update of drug resistance mutations in HIV-1. He is co-author of the Rega algorithm for interpreting resistance to antiretrovirals and is a virologist for the EuroSIDA European cohort. His group in now leading pioneering research into the role of the gut microbiome in the pathogenesis of HIV infection and chronic inflammation. He combines his research with a medical care role in the HIV unit of the Germans Trias i Pujol University Hospital (Badalona).