Retroscreen Virology We are Europe's leading specialist virology contract research organization (CRO). The work we conduct is dedicated to creating the next generation of antiviral drugs and vaccines for the treatment of a number of respiratory and enteric viral infections. Our research includes laboratory-based pre-clinical work which is performed by our Translational Research group, and proof of principle/ concept challenge studies (Phase 1b and Phase 2a studies). Retroscreen is the only company in the world dedicated to the conduct of viral challenge studies in humans. These studies are conducted in the company’s purpose-built and specifically designed quarantine unit located in London, UK. Conducting clinical challenge studies in a controlled, quarantine environment allows for more cost effective, superior designed clinical trials and, as a consequence, accelerated selection of safe and effective dose and dosing regimes for new antiviral drugs and vaccines. We currently conduct and co-ordinate several clinical trials per year and to date have performed over 20 studies involving the inoculation of over 800 volunteers with virus. As such, our experience in this field is unparalleled. We also benefit from advice and encouragement from a group of internationally known scientists chosen to represent a diverse range of virological, medical and scientific experience.