What is better: face shield or face mask?

faculty discussion on the issue can be found here:
https://www.facebook.com/groups/onlinelearningcollective/permalink/621278065169562/
If you don’t have FB account and/or more info needed, please contact us.

Here more information:

‘Only those with plastic visors were infected’: Swiss government warns against face shields

July 15, 2020
https://www.thelocal.ch/20200715/only-those-with-plastic-visors-were-infected-swiss-government-warns-against-face-shields

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Face Mask vs Face Shield: Which Is More Effective Against Coronavirus?

https://www.ibtimes.com/face-mask-vs-face-shield-which-more-effective-against-coronavirus-3013922

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Is a Face Shield Better Protection Against the Coronavirus Than a Face Mask?

May 28, 2020

https://www.health.com/condition/infectious-diseases/coronavirus/face-shield-coronavirus

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Why Aren’t Face Shields More Popular in California?

June 29, 2020

https://www.nytimes.com/article/face-shield-mask-california-coronavirus.html