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L'obbligo di mascherina nelle scuole ha effettivamente rallentato la diffusione del Covid-19. È la conclusione a cui è giunto uno studio dell'Università di Berna che mercoledì è stato pubblicato sulla rivista specializzata "Plos Medicine".
In concreto: l'impiego delle mascherine ha ridotto del 70% la concentrazione di coronavirus nell'aria. Con un purificatore dell'aria, la presenza del virus si riduceva invece del 40%.
In questo modo, sempre secondo lo studio, durante il periodo con obbligo di mascherina nelle scuole è stato possibile evitare fino a diciannove infezioni da Covid-19 ogni novanta allievi (si tratta del 21% dei casi). I ricercatori hanno analizzato i dati di due scuole medie del canton Soletta durante l'ondata di Omicron, da gennaio a marzo 2022.
Mascherine a scuola
Telegiornale 24.01.2021, 20:00
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