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Predictions of the cumulative number of Ebola cases in Sierra Leone by the logistic growth equation (see text or Figure 1 for equation). Model fits (A-D) are shown for an increasing number of data points used for model calibration. The black solid lines correspond to C(t), the predicted cumulative number of Ebola cases. Blue circles are future cases used for model validation. The dotted lines correspond to the 95% confidence intervals of the prediction curve provided by the model.
