The one thing that you haven't mentioned is the use of a broad-spectrum ANTIVIRAL, like antibiotics, but this would halt the spread of the virus, itself.
They don't exist?
Actually, at least one does - AgNPs.
Visit PubMed.GOV.
Note: .gov means US gov't.
It's never stable, so silver atoms don't stick together as tightly as gold's atoms do.
They swarm.
Literally, that's why silver nanoCLUSTERS (the ACCURATE description) fit into the binding enzymes' active sites like a *magic key*.
Binding enzymes are configured to attach to one specific protein (which varies from one virus type to the next) on the host cell.
Once inside, the silver atoms don't leave.
And the binding enzymes can't stick to their intended target
But it does render them incapable of infecting any host cells.
You can make a suspension of these AgNPs in the purest water possible (de-ionized distilled water), and the tiny nanoCLUSTERS will float around in the water
They won't fall out of the water because they're too small, and water molecules themselves are constantly banging around, which keeps them suspended (unless you put too many of them together, in which case they glom together and get too big).
Back then, it was called "Colloidal Silver", and it was used to treat infections/Sepsis. My grandmother's app'x ruptured a century ago, and it prevented her from dying.
In 1977, when Pharma realized antibiotics were more profitable, they stopped making it.
Since then, they've tried to stamp it out of existence, but quietly, lest they advertise its existence.