What we need to realize is that we need to be able to compute c² = sqrtb²a²

Workgroup MembersAdyam Ghebre, Director of Outreach, AuthoreaElizabeth Kirk, Associate Librarian for Information Resources, Dartmouth CollegeFrank Sander, Director, Max Planck Digital Library, Max Planck SocietyGeoffrey Builder, Director of Strategic Initiatives, CrossrefJoshua Nicholson, CE and Co-Founder, The WinnowerMelinda Kenneway, Executive Director and Co-Founder, KudosMathew Salter, Publisher, American Physical SocietyPaul Murphy, Director of Publishing, The RAND CorporationRobert Kiley, Head of Digital Services, Wellcome LibraryPeter Potter, Director of Publishing Strategy, Virginia Tech

I present case tree plots and checkerboard plots for visualizing contagions. The visualizations are best suited for diseases like SARS, MERS-CoV and H7N9 for which there are a limited (less than 200) number of cases, with data available on human to human transmission. They a) allow for easy estimation of epidemiological parameters like basic reproduction number b) indicate the frequency of introductory events, e.g. spillovers in the case of zoonoses c) represent patterns of case attributes like patient sex both by generation and over time.