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. 2021 May 28;112(4):566–575. doi: 10.17269/s41997-021-00544-1

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Fig. 1 — Case definition algorithm. COVID-19 outbreak investigation, 9 April to 18 May 2020 (Institut national de santé publique du Québec, 2020; Kucirka et al., 2020; Ministère de la Santé et des Services sociaux, 2020)