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Are Face Shields More Effective Than Face Masks?

But what about airflow — and just how airtight are they?

“For any mask or fancy filter, one thing we need to keep in mind is how well they fit, tightly, to the face,” said Chenyu Sun, an internist at Saint Joseph Hospital in Chicago who recently co-authored a study on face mask efficacy.

Dr. Sun said health care workers often get specially fitted for N95 masks, and the one-size-fits-all approach of retailers is troubling. So is the lack of guidance for proper use.

“Inside out, upside down, probably even less people know how to take masks off properly without contamination. This also applies to these devices,” said Dr. Sun, who added that sporting doomsday gear may have unintended psychological consequences. “Will the general public really accept these? Now, even for regular masks, there is a lot of debate.”

“People double-take, but I think Canada is very polite so nobody

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