Fig. 2From: Face mask recommendations in schools did not impact COVID-19 incidence among 10–12-year-olds in Finland – joinpoint regression analysisMoving averages of observed 14-day COVID-19 incidences per 100 000 inhabitants in 7–9-year-olds (solid line) and in 30–49-year-olds (dashed line) in Helsinki, Tampere and TurkuBack to article page