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Journal Articles Scientific Reports Year : 2023

Modeling the impact of national and regional lockdowns on the 2020 spring wave of COVID-19 in France

Abstract

Several countries have implemented lockdowns to control their COVID-19 epidemic. However, questions like “where” and “when” still require answers. We assessed the impact of national and regional lockdowns considering the French first epidemic wave of COVID-19 as a case study. In a regional lockdown scenario aimed at preventing intensive care units (ICU) saturation, almost all French regions would have had to implement a lockdown within 10 days and 96% of ICU capacities would have been used. For slowly growing epidemics, with a lower reproduction number, the expected delays between regional lockdowns increase. However, the public health costs associated with these delays tend to grow with time. In a quickly growing pandemic wave, defining the timing of lockdowns at a regional rather than national level delays by a few days the implementation of a nationwide lockdown but leads to substantially higher morbidity, mortality, and stress on the healthcare system.
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hal-03977474 , version 1 (07-02-2023)

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Jonathan Roux, Clément Massonnaud, Vittoria Colizza, Simon Cauchemez, Pascal Crepey. Modeling the impact of national and regional lockdowns on the 2020 spring wave of COVID-19 in France. Scientific Reports, 2023, 13 (1), pp.1834. ⟨10.1038/s41598-023-28687-w⟩. ⟨hal-03977474⟩
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