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Scientists develop new method for visualizing breath to evaluate face masks

A new method for visualising the air exhaled while someone is speaking or singing could shed light on how diseases such as Covid-19 spread, and help evaluate the effectiveness of face masks, according to a study.

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A new method for visualising the air exhaled while someone is speaking or singing could shed light on how diseases such as Covid-19 spread, and help evaluate the effectiveness of face masks, according to a study.