Your hand has oils on it, and viruses stick to that oil. They have an electrostatic charge to them. But when you’re washing with soap, soap has things that decrease surface tension in them so you are physically rubbing by friction and washing away that virus. It is the most effective thing we know to do. That’s why surgeons, for example, scrub their hands so very carefully before they go into an OR. It works, and it works really well.
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