No! It’s bloody useless because you’re not just receiving it through your respiratory passage, but also eyes. And then you touch a surface which someone has put bodily fluids on and put your fingers in your mouth or rub your eyes.

Masks are excellent for stopping transmission for infectious patients however - because it catches particulates.

Current (and to be fair, there remains some debate but it seems it is really just the precautionary principle) evidence suggests that spread is by droplet. So a mask doesn’t help stop you receiving it. Definitely helps you stop transmitting it; definitely helps healthcare workers who are exposed to high titre loads, and will be working sick unlike the rest of the population,

But the average person can reduce both their transmission and infection by being vigilant with hand washing, masks if sneezing/coughing/isolating, not touching face/mouth/eyes

Leave the masks to the healthcare workers and the infected