Eric Walker added Opinion | Why Covid's Airborne Transmission Was Acknowledged So Late - The New York Times to a number of topics

Eric Walker added How Data Became One of the Most Powerful Tools to Fight an Epidemic - The New York Times to a number of topics

Eric Walker added Opinion | Why Covid's Airborne Transmission Was Acknowledged So Late - The New York Times and How Data Became One of the Most Powerful Tools to Fight an Epidemic - The New York Times to John Snow, and added John Snow to London and Epidemiology

Eric Walker added John Snow, William Farr and Google Flu Trends and a number of links to Epidemiology, and added Epidemiology to Public health

Eric Walker added a number of topics and a number of links to London, and added London to Cities in England