The problem I see with that set of comparison set of photos is that the camera simply can't see anything as small as a CCP Virus cell, on the order of 15-30nm. It does show it will stop aerosolized spittle, but not that it can, or will stop the virus itself. Saying the virus is only transmitted when attached to aerosolized particles is also misleading, since it can be easily expelled solely by itself. This is exactly why mask manufacturers, even those making N(% masks, say that they are not designed to stop viruses. Just look on the label or look up the product information.