My son works in the construction department for a chain-type hospital.
They just let out a contract to replace all the vinyl tile flooring in all the waiting rooms and certain other rooms of all their hospitals, with carpet. However, they had a hard time finding carpet without vinyl in the backing. They are doing it because they found the vinyl flooring was "out gassing" and making asthma patients worse.
I tried to think of a way homeowners and renters could accomplish that without tearing up their house. The best I came up with was putting something over the vinyl to block the outgassing and then something like sisal over that.
I have no idea if this is new or old info, but I thought I'd write about it in case it was new.