Common Cold Institute

hVIVO is a world-leading contract research organization (CRO) specializing in human viral challenge studies, often described as the commercial "resurrection" of the historical Common Cold Institute (the MRC Common Cold Unit). The company provides end-to-end services for the development of vaccines and antivirals, utilizing its proprietary Human Viral Challenge Model to test efficacy in a controlled environment. hVIVO operates specialized quarantine facilities where healthy volunteers are inoculated with specific viruses, such as influenza, RSV, and rhinovirus, to monitor disease progression and treatment response. Formerly known as Retroscreen Virology and later part of Open Orphan, the company is now publicly traded on the London Stock Exchange. Its "FluCamp" brand is well-known for volunteer recruitment and clinical trial execution.