What is different between droplet , aerosol , and airborne ?


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Saliva and mucous droplets are heavier than air, which means gravity starts pulling them, whatever viral particles they contain,towards the ground as soon as they leave someone’s body. By the time someone walks out of a room, any droplets they may have emitted have likely already settled on the floor or nearby surfaces. Aerosols are form when smaller droplets evaporate faster than they fall to the ground, leaving nuclei measuring less than five micrometers in diameter. Without heavy liquids dragging them down, virus particles from these evaporated droplets are able to float through the air for up to half an hour.  Airborne viruses are more likely to spread in rooms with poor ventilation than they are outdoors.
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Airborne spread happens when a germ floats through the air after a person talks, coughs, or sneezes. ... Droplet spread happens when germs traveling inside droplets that are coughed or sneezed from a sick person enter the eyes, nose, or mouth of another person.

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