I’m just stood waiting to meet some friends, watching activities in a pub beer garden. The staff are carrying food around on a tray whilst wearing face visors, no mask or anything of that nature. Whilst watching, it’s occurred to me that the visor is acting like a baffle or vane and diverting breath vertically downwards onto the food they are carrying. The face visors are probably worse than wearing no PPE at all.
I think we’ve reached a point where the medicine is now lagging behind the engineering, but as usual, the engineering is being disregarded because it’s only for grubby men who wear overalls.