Fig. 3.

Probability function of the accumulated number of infected players n(t) at the beginning of the re-start (A, $t=4$ days), after few weeks (B, $t=20$ days) and at the end of the season (C, $t=78$ days), and probability function of the accumulated number of infected teams M_inf(t) at the end of the season (D, $t=78$ days), when matches and PCR controls are carried out every 7 days. For these 4 cases, $\overline{n}\pm {\sigma }_n=1.6\pm 0.8,$$\overline{n}\pm {\sigma }_n=4.3\pm 3.6,$$\overline{n}\pm {\sigma }_n=5.6\pm 4.8,$ and ${\overline{M}}_{inf}\pm {\sigma }_{M_{inf}}=1.4\pm 0.6$ respectively. Approximations to a Poisson distribution of mean $\overline{n},$ to an exponential distribution of mean $\overline{n}$ and to a normal distribution of mean $\overline{n}$ and standard deviation σ_n are shown in (A-C), while an approximation to a Poisson distribution of mean ${\overline{M}}_{inf}$ is shown in (D). 10⁵ simulations of the league were performed.