Deep Cleaners Have Their Day in a Nation Paralyzed by a Pathogen – Scientific American
As it travels between hosts, SARS-CoV-2, the virus that causes Covid-19, appears as a tiny, spiky orb, between 50 and 200 billionths of a meter across. Expelled from the human body by a cough, say, or a well-placed sneeze the virus can settle on surfaces, where it sits, microscopic and immobile, for hours or even days. If something comes along and touches the surface, the virus can travel with it to a human hand, then from a hand to a face, and from there into the body.
Unless, that is, something destroys it first.