The velocity of Ebola spread in parts of west Africa

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The velocity of Ebola spread in parts of west Africa Kate Zinszer, Kathryn Morrison, Aranka Anema, Maimuna S Majumder, John S Brownstein  The Lancet Infectious Diseases  Volume 15, Issue 9, Pages 1005-1007 (September 2015) DOI: 10.1016/S1473-3099(15)00234-0 Copyright © 2015 Elsevier Ltd Terms and Conditions

Figure EVD spread across Guinea, Liberia, and Sierra Leona Contour plot of the predicted week delay from the trend surface model with a polynominal order of six (A), speed and velocity of EVD spread by district (B), and average speed of EVD spread (dots) and confirmed cases of EVD by week by country (C). The inset map shows the Western Area Urban and Western Area Rural districts of Sierra Leone. The square root was taken for scaling purposes and the angle of the arrowhead represents the direction of spread and the size of the arrowhead is proportional to the square root speed in km per week (B). EVD=Ebola virus disease. The Lancet Infectious Diseases 2015 15, 1005-1007DOI: (10.1016/S1473-3099(15)00234-0) Copyright © 2015 Elsevier Ltd Terms and Conditions