Figure 3


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Evolution of state proportions – St (susceptible), It (infected, detected or not, ), Rt (recovered and immune, detected or not, ), Ut (hospitalized in ICU), Dt (dead), t (dynamic version of the reproduction number), Wt (labor force available), Qt (susceptible to be quanrantines, ) and δt (lockdown intensity) – with optimal control δ (plain line) and without control (dashed line). States vary here from t = 0 (beginning of the pandemic, or at least of possible measures, with δ ≥ 0) to t = 700, and computations are based on a dt = 1∕5 days.

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