To me I just don’t see how this would work or filter anything. So it 95% is blocked, then 5% of the particulate will pass through the filter and cause harm. It’s like saying you are on a submarine and saying it’s 95% sealed. Then the rest would fill up the submarine then you’d end up dead. Is there something else I’m missing here?
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Think of every droplet that you breathe in as a little roll of the dice for how likely you are to get infected. If your goal is to not get infected, you want to roll those dice as few times as possible.
This happens in both directions: if you are infected without realizing it (everyone typically is 1-3 days at the start of their infection), the mask also reduces the number of dice rolls the people around you have to make, even if they aren’t wearing a mask.
Fewer dice rolls in a community means a lower rate of infection in the community, allowing the hospitals to keep up and allowing people more time to get vaccinated or boosted so that if they do get infected, they’ll almost be guaranteed to survive.
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