What if everyone had masked up? Analysis of app data has an answer
Briefly

A comprehensive modelling study utilizing nearly 250,000 positive COVID-19 tests reveals that the widespread use of high-grade masks could have significantly reduced transmission rates across the United Kingdom. The researchers estimate a potential decrease in virus spread due to universal masking, highlighting the importance of protective measures during pandemics.
The findings indicate that if high-grade masks had been universally adopted, the rate of COVID-19 transmission could have been markedly lower, emphasizing a critical public health intervention. This study underscores how preemptive measures like masking can play a vital role in controlling outbreaks.
Read at Nature
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