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Are 20 seconds of handwashing really necessary? Physics says yes

A social-distancing ambassador wearing a face mask mans a hand-washing station.

No shortcuts, please: modelling supports the public-health directives to wash hands for 20 seconds. Credit: David Cliff/NurPhoto/Getty

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Nature 596, 465 (2021)

doi: https://doi.org/10.1038/d41586-021-02241-y

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