While the usefulness of surgical masks, in general, is quite well known (surgeons have been using them for years) there is little-to-no data on many of the DIY face coverings people have been using during the coronavirus pandemic. So, researchers at the Florida Atlantic University’s College of Engineering and Computer Science have done some tests of their own.

The experiment was published in the journal Physics of Fluids and demonstrates the effectiveness of wearing a face covering when you cough using some pretty cool flow visualisation using lasers. Of course, this post isn’t a debate about whether or not you should or shouldn’t wear a mask. You should. This technique just shows that even the simplest of masks helps reduce the risk of infection and it does so using a very cool technique

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