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. 2021 May 4;23(5):e26932. doi: 10.2196/26932

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©Fabrice Denis, Anne-Lise Septans, Florian Le Goff, Stephan Jeanneau, François-Xavier Lescure. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 04.05.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on https://www.jmir.org/, as well as this copyright and license information must be included.

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Contamination circumstances before versus after the partial lockdown, which was triggered in France on October 25, 2020. Answer to the question “Who contaminated you or your close relative?” (P<.001).