I never saw the point of staff in restaurants wearing visors instead of masks. As the wearer is generally standing and the customer sitting, it seems to me all they do is direct whatever covid the wearer has down to customer level, and onto whatever it is they’re carrying. I reckon exposure (to a customer) would be less if they didn’t bother! Though, round here at least, visors went almost as soon as they came...for a week or so they were everywhere, but masks soon prevailed again. I assume they are less comfortable to wear? I still see people driving round solo in their own cars wearing a mask, which bemuses me
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