If you don’t cover your mouth when you sneeze—sending it into the inside of your elbow, if not a tissue—that sneeze and the germs within it are explosively set free into the surrounding area. But where do the droplets travel and how far can they reach? No one had done much research into the physics of sneezes and coughs… until now:
To address this knowledge gap, Lydia Bourouiba and John Bush of MIT’s Applied Mathematics Lab used high speed cameras and fluid mechanics to reveal why we’ve grossly underestimated the role of gas clouds in these violent expirations.
Follow that video with this Schlieren imaging clip of a man breathing and coughing…
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