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
When you breathe out your breath also contains a lot of water vapour, bacteria and viruses can “piggyback” on the water vapour and travel substantial distances, breathing out can trap the water and also trap any infections carried by the water. This form of water vapour breathed upon someone can be prevented from being breathed in directly from another person, but the mask doesn’t stop that water vapour from hitting the rest of your face, your hands or some other part of your body and later being transferred into your body which is why washing your hands regularly is a good idea.
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