Effectiveness of isolation, testing, contact tracing and physical distancing on reducing transmission of COVID-19 in different settings

1​Centre for Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, ​2​Department of Veterinary Medicine, University of Cambridge, ​3​Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, 4​Department of Applied Mathematics and Theoretical Physics, University of Cambridge, ​5​Centre for Advanced Spatial Analysis, University College London