The smaller aerosol particles go right through most masks. They don’t quickly fall to the ground and linger in the air.

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“Covid-19 … is spread from person to person mainly through the droplets produced when an infected person speaks, coughs or sneezes. These droplets can land in the mouths or noses of people who are nearby.

These droplets are too heavy to travel far in the air. They only travel approximately one meter [39 inches], and quickly settle on surfaces. This is the reason person-to-person spread is happening mainly through close contacts.”

Screenshot

Video is also here.

How to protect yourself against COVID-19

Feb 28, 2020

COVID-19 is an infectious disease caused by a new coronavirus introduced to humans for the first time. It is spread from person to person mainly through the droplets produced when an infected person speaks, coughs or sneezes. Watch this short animation to learn more about COVID-19 and how to protect yourself against it.

Related:

Study: Cough droplets only travel 3 feet — a few 4 feet.

And we’re supposed to cover our mouth if we cough, right? Masks were useless, unless coughing at each other a few feet away.

Eulerian–Lagrangian modeling of cough droplets irradiated by ultraviolet–C light in relation to SARS-CoV-2 transmission

Irradiating COVID-19 Cough Droplets with UV-C Lamps