Funding for this research was provided by:
Fonds National de la Recherche Luxembourg (COVID-19/14863306/PREVID, COVID-19/2020-1/14701707/REBORN)
H2020 European Research Council (ERC-CoG 863664)
Received: 14 October 2020
Accepted: 20 April 2021
First Online: 4 May 2021
: This analysis is based on administrative Covid19 surveillance data collected by the national public health authority conducting the contact tracing in Luxembourg and pseudonymised prior to analysis. Administrative permission to access the database Care+ and Techcare closed to public access was provided by the Health Directorate in Luxembourg. The data collection occurred within the framework of the specific Covid-19 law applicable in Luxembourg (ExternalRef removed). The national ethics committee CNER had no objection to the publication of the current analysis (Ref: 1220–226).
: Not Applicable.
: The authors declare no competing interests.