Fig. 4.

Manageable relaxation of measures by levels of vaccine coverage. (A) Peak in daily hospital admissions for different combinations of vaccine coverages in 18–64 y.o. (VC_18–64y) and ≥65 y.o. (VC_65y+). (B) Reduction in transmission rates necessary to avoid reaching 1000 daily hospital admissions. (C) Combinations of vaccine coverages in 18–64 y.o. and ≥65 y.o. and in (D) 0–64 y.o. and ≥65 y.o. necessary to avoid reaching 1000 daily hospital admissions. Different values of the basic reproduction number R₀ assuming complete relaxation are explored. The reductions computed in (A-B) assume a proportion ever infected in France of 30% (range 25%−35% corresponding to the vertical bars) upon relaxation on September 1st 2021. Results are reported for the vaccine Susceptibility that reduces severity by 90% and susceptibility by 80%. For each combination of vaccine coverage in 18–64 y.o. and ≥65 y.o., we report the corresponding vaccine coverage in those older than 18 y.o. (VC_18y+) and in the general population (VC_pop). In (C-D), different values for the proportion of people ever infected in France at the date of relaxation of measures are explored.