Fig. 2From: Reduction of SARS-CoV-2 intra-household child-to-parent transmission associated with ventilation: results from a case–control studyFlow chart for the identification of cases of SARS-CoV-2 infection with a confirmed source case within the household for the descriptive analysis and the selection of pairs of index cases and related controls for the case–control analysis Online nationwide study conducted in France between October 2020 and May 2022Back to article page