Face shields are OK, just received some feedback from different departments of the local hospital.
Those facemask prints are 0, they don't provide any seal between the face and the print. If one feels safe while wearing it, go for it.
The other interesting thing is this box, for anesthetists during intubation and extubation, because that's the moment when aerosol-generating events (AGEs) happen.
An article in the New England Journal of Medicine here.