> Buy the k95 masks if you want to actually protected but being in a room with someone with covid and you have the same chance of getting covid whether it is with or without the mask.
I agree that K95 are better if you choose to be in the room with someone for some time. Note that rooms can be made safer with open doors/windows/vents. In my tests with 2 people in a small room with 6 work places, having regular vents does not help, but just opening a door to a corridor solves the problem (CO2 level goes back almost outside level, that is air circulates out).