This is something I’ve heard a lot, and assuming it’s true, what’s the science behind it? Surely holes in masks are the same size no matter whether the germs are heading in or out, but I’m guessing it’s not about the holes and I’m missing something.
Obligatory disclaimer: I’m not an anti-masker, I’m still wearing it in shops for example. This is just me wanting to understand.
In: Biology
Not all masks are the same. The n95, respirators, and similar high-quality masks are all capable of helping prevent germs from being inhaled or exhaled, whereas the basic cloth masks pretty much only stop the exhalation, because they aren’t as closely fitted to the face. So you don’t blast a huge cloud of particles with breathing or coughs, but you can still inhale anything that is airborne with the cloth masks. N95s and respirators have to be fitted to your face, and seal more closely than the cloth.
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