Figure 1.

Virus survivability within freshwater and normalized country comparable risk of transmission (termed relative risk, H_c) associated with sewage spills after dilution by domestic water usage and river flow (results for 39 countries) . (a) Log₁₀ relative risk (H_c) covering the range of 0.001–1.0. Circles are median values, and horizontal lines show the 25th and 75th percentiles due to dilution factors from ref (21). (b) Countries where relative risk, H_c, has been calculated with relative risk as a linear scale. Gray signifies a country not included. (c) Modeled temperature survivability. The root-mean-square difference (RMSD) for each curve is given by the shaded areas.