Overall, these results suggest that in France, the 2020 autumnal lockdown was not the main initiator of the decrease in SARS-CoV-2 circulation and curfews were important in achieving control of the transmission. Indicators did, however, begin to rise once the autumnal lockdown was lifted and the state of emergency resumed. Indicators also suggest that viral circulation decreased earlier in locations where curfews were implemented. We show that the second peak in viral circulation in France happened ~21 October 2020, during the public health state of emergency but before the lockdown (31 October). This allowed alignment of all surveillance indicators with viral circulation during the second period of the epidemic, overlaid with the type of public health measures implemented. Methodsīased on a first lockdown, we measured the time lag between the peak of governmental and non-governmental surveillance indicators and the highest level of virus circulation. Here, we propose one way to solve this problem by synchronizing the indicators with viral circulation in a country (France) based on a landmark event.
However, pandemic indicators lag behind the actual level of viral circulation and these delays are an obstacle to assessing the effectiveness of policy decisions.
It is important to understand the impact of these measures on SARS-CoV-2 circulation. In response to the SARS-CoV-2 pandemic, governments have taken drastically restrictive public health measures with significant collateral effects.
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