Fig. 5.

$R_t$ trend in Sardegna. The change to the white level was established on March $1\mathrm{st}$, 2021. Considering the required delay of 8 days, we display the change on March $9\mathrm{th}$, 2021. The steep ascent of $R_t$ begins on March $14\mathrm{st}$, 2021. The first 8 values of $R_t$ are colored in grey since they don’t correspond to any of the three NPI levels here considered after having applied the 8 days time delay