Fig 2. Number of SARS-CoV-2 infection notifications (bars) by calendar week in children aged 0–19 years in two distinct periods: from January 2020- November 2021 (the pre-Omicron era and period of strict public health measures, including international and internal border closures) and December 2021 –December 2022 (post Omicron period and with progressive easing of public health measures), and high levels of population vaccination coverage in adults and adolescents (lines; %).