>>11890653>Because the virus persists in droplets of 6 to 8 nanometers and no one wears correctly rated masksMasks have the capability of stopping particles far smaller than their pore size, provided they're actually worn over the nose and mouth (which is another issue). Plus aerosols become smaller due to evaporation as they linger in the air, meaning it's beneficial to catch them coming out of a person's mouth rather than after they've been lingering in the air and becoming smaller.
Of course having properly rated masks for everyone would be nice, but since that won't be a reality any time in the near future, a surgical mask or decent homemade mask is better than nothing.
