Why don't you read the article? The distinction is between aerosols and droplets, in the case of corona virus, and by asking this question it looks like you're chasing the wild goose that OP brought into this thread.
Up front: I am not a virologist; I am not saying these things are true, I am saying this is my understanding of this discussion. I am also not saying that Sars-Cov-2 can spread by small dry particles.
I think there a 3 distinct things going on, at least.
Large Wet Particles (droplets): easily caught by masks, fall quickly (3-6 feet), make surfaces infectious, cause infection by touch.
Small Wet Particles (aerosol type 1): Hang in the air for at least 30 minutes. Infectious if breathed in. Mask is less effective (but not ineffective)
Small Dry Particles (aerosol type 2): Hang in the air for 12 hours. Infectious if breathed in. Infectious by touch. Mask is less effective (but not ineffective). Most viruses are not viable as dry particles.
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