This just occurred to me. All the requirements about wearing masks still in entering medical centres are really besides the point. Note that people with the mask never have eye protection, but in principle viruses can be contracted through the eyes as well, with the eye fluids basically drain into the nose, and hence the respiratory tract. So, the mandates should have required eye protection as well. I am sure that with the next plandemic they health authorities will get it right!
https://link.springer.com/article/10.1007/s12560-011-9056-7