[stelfer]

It's not clear that it spreads via aerosols, in fact it's more likely that it spreads via droplet and contact. Thus the virtue of the mask is that it keeps the individual's fingers away from their faces. From the perspective of the theory in the article, masks keep people's fingers out of their noses. Of course, there are other ways to do that.

[grogenaut]

Such as?

[spking]

Not picking your nose.