Additional file 1 of COVID-19 surveillance in the Flemish school system: development of systematic data collection within the public health school system and descriptive analysis of cases reported between October 2020 and June 2021 ...

Additional file 1: Supplement Figure 1. Flow chart Surveillance network and Study sample. Supplement Figure 2. Surveillance system data flow and components. Supplement Figure 3. Relative difference in reported COVID-19 cases per week per 100,000 by grade relative to grade 7–8. Supplement Figure 4. Evolution number of confirmed SARS-CoV-2 PCR and antigen tests (left Y-axis) and positive tests (right Y-axis) in children 6-18 years old and in adults 19-79 years old in Flanders. Supplement Figure 5. SARS-CoV-2 test positivity rate adults 19-80 compared to children 6-18 in the community. ...