[nomadking]

Originally Posted by Carth

Face mask or plastic face shield, same thing . . . helps to prevent the spread of virus particles in face to face contact.

We use face shields at work, as do many places.

Link

Where things get difficult is with what happens to the aerosols when wearing a plastic shield.
“Nearly all of the aerosols were coming around the side of the face shield and reached nearly the same distances as without wearing anything,” says Echternach. These results are still to be published, but Echternach says they should serve as a warning for anyone relying on face shields alone to keep them safe as pandemic lockdowns are eased.
“They are certainly not effective when you are in close contact with someone,” he says.
The US Centers for Disease Control and Prevention appears to agree with him – it does not recommend face shields for normal everyday activities or as a substitute for masks. The Swiss health authorities have also warned against using face visors instead of masks after an investigation into an outbreak of Covid-19 at a hotel in the canton of Graubünden revealed all those who were infected had been wearing plastic face shields, while those who avoided infection were in masks.