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. 2021 Jul 19;224(9):1489–1499. doi: 10.1093/infdis/jiab375

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© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 4. — Serological reconstruction of past coronavirus disease 2019 transmission in Oise Department, Franch. A, Of 725 samples collected from residents of Oise Department between 13 November and 17 December 2020, 65% (474/725) were severe acute respiratory syndrome coronavirus 2 seronegative. For the 251 seropositive individuals, we estimated that 80.2% (95% confidence interval [CI], 47.3%–94.5%) were infected in the 6 months from December 2019 to May 2020, 0.0% (95% CI, .0%–52.1%) were infected in the 3 months from June to August 2020, and 12.6% (95% CI, .0%–29.2%) were infected in the 3 months from September to November 2020. Proportions are presented as median estimates and do not necessarily sum to 100%. B, Reported intensive care unit (ICU) admissions in Oise Department between 18 March 2020 and 1 December 2020. Of the ICU admissions, 56.0% were reported in the 3 months from March to May, 8.7% were reported in the 3 months from June to August, and 35.3% were reported in the 3 months from September to November.