Denmark is sequencing all coronavirus samples and has an alarming view of the U.K. variant

[ProfessorGAC]

17. That Wasn't The Topic

I don't disagree, but the discussion was about the distancing needs due to distance of expulsions.
That said, despite their miniscule dimensions, viruses still adhere to gravity.
They all ultimately fall to the ground.
And, those chemical structures are fairly friable, because some protein bonds are very low energy.
Relatively modest frictional forces can actually break molecular bonds. That's not uncommon in very high molecular weight species.
Even polymers are friable, which is why most of them need to be crosslinked. Crosslinking increase tensile strength and elasticity, so the forces is absorbed between the chains, rather than the chain fracturing.
Now, that's not the case for things like polyethylene, because the monomer is so small that the bond energy doesn't get "diluted" along the chain.
But, proteins can be pretty fragile.
All that, to say that viruses on the ground are a tiny concern compared to all the other transmission routes.