Rage Against the Machine are one of the many bands who have tweeted a poster created by the site. Credit: C Flanigan/FilmMagic If you're getting fed up of being told to wash your hands for 20 seconds, ...
According to the NHS, you should wash your hands for around 20 seconds or “the amount of time it takes to sing ‘Happy Birthday’ twice.” A fair choice since that’s a song most Americans are familiar ...
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