“…Far-reaching socially isolating measures could have a profound effect on mental wellbeing of adolescents, although recent studies show conflicting results. Several studies have shown signs of deteriorating mental health among adolescents during the COVID-19 pandemic [ 20 , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] ], whereas studies from the Netherlands, Sweden, and Canada showed no difference or even a decrease in the incidence of mental health problems in 2020 compared to pre-COVID-19 years in adolescents [ [33] , [34] , [35] , [36] , [37] ]. Since most of these studies were conducted within the first year of the COVID-19 pandemic, the study period could have been too short to observe robust changes in mental health.…”