An excellent model developed by Alison Hill:: The graph shows the expected numbers of individuals over time who are infected, recovered, susceptible, or dead over time. Infected individuals first pass through an exposed/incubation phase where they are asymptomatic and not infectious, and then move into a symptomatic and infections stage classified by the clinical status of infection (mild, severe, or critical). A more detailed description of the model is provided in the Model Description tab. The population size, initial condition, and parameter values used to simulate the spread of infection can be specified through the sliders located in the left-hand panel. Default slider values are equal to estimates taken from the literature (see Sources tab). To reset default values, click on the Reset all button located on the bottom of the panel. The plot is interactive: Hover over it to get values, double-click a curve in the legend to isolate it, or single-click to remove it. Dragging over a range allows zooming.