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What role do aerosols play in this?
It is understood by tiny particles of extremely low weight that are constantly expelled with the air we breathe. They are released into the air through these (and not just through droplets). Since it is constantly moving, the aerosols due to their lightness float for several hours before sinking into the ground. Therefore, they can spread viruses greater distances than droplets. Due to their greater weight, these sink to the ground much more quickly. Therefore, in times of colds, and of course especially now during the Corona crisis, the following applies: Regular ventilation reduces the risk of infection by aerosols. Because then fresh air enters the room, while “polluted” air comes out. Studies show that it makes more sense to open a window (“air” for 3 minutes) rather than simply tilt it. Wearing mouth and nose protection also reduces the amount of inhaled droplets, aerosols, and therefore viruses. This reduces the risk of infection, no matter what.
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