Figure 3. Logistic fitting of the Bayesian skyline plot and force of infection.

A) the normalized median of the Bayesian estimates from the sequences analyzed, y(t), fitted to a continuous logistic curve according to equation (1). Diamonds represent the data and the continuous line the fitted function. The period of time entails the epidemics during the fat growing phase during January and February of 2006. B) Force of infection calculated from the fitted model in A) using equation (2).