Fig. 6: Analysis of the vaccination strategies.

In this scatter plot, each point corresponds to a unique simulation based on a distinct vaccination strategy. The horizontal axis displays the relative variation in the number of cases at the next largest peak relative to the baseline case, while the vertical axis represents the relative variation in the number of cumulative deaths, both with respect to the baseline. Our objective is to minimize these two metrics in order to identify strategies that outperform the baseline scenario. Each plot point conveys three distinct variables: color, shape, and size. The color signifies the strategy’s implementation time (t_start), with brighter shades indicating later starting time. The point’s shape indicates the primary age group targeted by the strategy, and the point’s size reflects the campaign’s duration, where larger sizes denote longer duration. It is important to note that the total number of vaccines administered remains constant, irrespective of the campaign’s duration. As we can see, many of the analyzed strategies yield negative outcomes. Points on the positive side of the horizontal axis indicate an increase in the number of cases during the second peak. However, it is important to note that none of the simulations results in an increase in the number of deaths. Finally, the black solid line marks the Pareto front, which indicates the optimal strategies.