Led by Professor Paul Elliott, the REACT (REal Time Assessment of Community Transmission) study involves more than 100,000 people and tracks the progress of coronavirus using antibody finger-prick tests to track past infections. Commissioned by the Department of Health and Social Care, it is the first nation-wide antibody study using self-testing to be rolled out across England. Initial results estimate almost 6% of the population to have antibodies to coronavirus by the end of June 2020, with the highest number of people in London.