Acknowledgements
This work was supported by the French Government under the “Investments for the Future” programme managed by the National Agency for Research (ANR), Méditerranée-Infection 10-IAHU-03. Testing of repatriates was approved by the ethical board of the Committee for the Protection of Persons (CPP Ile de France VI dated 06–02–2020).

Conflict of interest: None declared.
Authors’ contributions: Conceived and designed the manuscript: DR. Contributed materials/analysis: PC, BLS, VEV, LN, CZ, MTJ, CG, MB, VF, AGG, HC, PB, JCL, DR. Wrote the paper: PC, DR. Reviewed and approved the manuscript: all authors.