Fig. 2

The MATLAB interface used for the model (developed by Participant 1).The growth rate G(N) for the Dominican Republic is shown by the solid blue curve. The inverted parabola in red represents its quadratic approximation G _f (N). Parameter values are set by the sliders on the left. The bottom right plot compares the predicted and observed cumulative epidemiological curves: the red stars are the model predictions obtained by solving dN/dt=G _f (N); the reported data (from PAHO) are shown as blue circles