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It prevents the spread of a viral load. Breathe out normally and your breath reaches a couple of meters in front of you. Breathe with a mask on and it stays localised around you.
It’s a slight variation of coughing or sneezing into your hand/handkerchief/elbow.
It’s a slight variation of coughing or sneezing into your hand/handkerchief/elbow.
Coughs and sneezes don't happen 12 to 16 times per minute. Localization would only be a benefit if there isn't moving air or wind or people changing positions.
Both of you are right: Masks and distance make a difference - and in the end, that difference doesn't matter. We are talking about 10x virus particles with x=1 is enough for an infection. So if a mask reduces x from 5 to 3, this is a drastic reduction, but it will infect or spread anyway. A MIT study that looked at some well known super spreader events showed that all people in a room are similar affected, regardless if they sit 6 or 60 feet away from the spreader.
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