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

Eric Walker added How Data Became One of the Most Powerful Tools to Fight an Epidemic - The New York Times to William Farr, and added William Farr to Mathematicians and statisticians and Epidemiology

Eric Walker added William Farr, Nicolaas Govert de Bruijn and David Hilbert and Directed graph - Wikipedia to Mathematicians and statisticians, and added Mathematicians and statisticians to Mathematics and statistics and Scientists, researchers and academics