Correct. You need masks that can block the biological material. The way the masks (and it’s only a subset of them that can) do it is by having an electrostatic layer. Once you get the mask wet, the layer is lost and it’s unable to block.
Correct. You need masks that can block the biological material. The way the masks (and it’s only a subset of them that can) do it is by having an electrostatic layer. Once you get the mask wet, the layer is lost and it’s unable to block.