Figure 4

Temperature distance from 25% _G7 transmission risk contour. The 4A ogive (cumulative distribution curve for the histogram) for each nation was plotted with a vertical line at the zero point. For Figure 4A bins of 2 degrees C width are used to categorize temperature distances from the 25%_G7 transmission risk contour. Figure 4B presents the same temperature distance data in a linear density plot for each nation, with a tick mark for each temperature distance, and the arithmetic mean. The temperature distances were calculated for each point shown in Figure 3 using a Maple generated 25%_G7 transmission risk contour line equation. (See equation 1, and Additional file 1- Contagion contour estimation details for equation and details of use.) For both figures, the zero point of these graphs is the 25%_G7 transmission risk contour line.