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. 2020 Jun 18;326:108405. doi: 10.1016/j.mbs.2020.108405

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Fig. 4 — Illustration of a potential scenario where a second wave can occur with high peak after lockdown and social distancing restrictions are relaxed. $T_{0}$ is the time when the restriction started and $T_{e n d}$ is the time when the restrictions are lifted.