Jens Finkhäuser 🌻@strypey @clacke The question of which masks to use is one of the size of particles you want to capture. Since COVID is airborne, you should absolutely go for the best filters available; some masks mostly capture droplets.
But that doesn't stop the masks from being effective. See e.g. https://doi.org/10.1126/science.abi9069 for a study that focuses on effect rather than mechanism. The likely conclusion, then, is that droplets contain more of the virus and are more infectious, but that's also a given really.
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