In many customer facing and security roles, a mask is not appropriate. In these circumstances shield (or visors) might replace masks as a more comfortable and more effective deterrent to COVID-19.

"Face shields, which can be quickly and affordably produced and distributed, should be included as part of strategies to safely and significantly reduce transmission in the community setting," University of Iowa.

Shields have a number of advantages over masks: first of all, they are endlessly reusable, simply requiring cleaning with soap and water or common disinfectants; secondly, shields are usually more comfortable to wear than masks, and they form a barrier that keeps people from easily touching their own faces

When speaking, people sometimes pull down a mask to make things easier—but that isn't necessary with a face shield. The use of a face shield is also a reminder to maintain social distancing, but allows visibility of facial expressions and lip movements for speech perception

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