If there was a deadly virus in the air, where would it be?
Now think about this logically - it would be everywhere, on the ground, on every building, on every tree, plant and animal, on our hair, clothes and shoes, on every car, bus, train and lorry, and every bird and insect flying in the air. And that deadly virus would also be on your face and mask, the one you keep putting on and taking off, and touching all the time, mixing nicely with all the bacteria from your hands and mouth.
This is what you need to wear when you are in the vicinity of a deadly virus - a full hazmat suit and separate oxygen supply, not a piece of rag across your mouth that you made from an old t-shirt, or 3 for a pound from Poundland. Wake up people, look beyond the fear and see reality.