Fig. 1.

Stochastic model fitting: Simulated and actual values of the cumulative confirmed and death cases in Spain for the time span February 25, to October 9, 2020, are represented, respectively, by blue and green colour curves with $\sigma =0.4$ and different force of infection, $\lambda$. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)