Briefings

Week InReview: February 12, 2021

Face masks go high-tech, but do you need one?
 
Photo: F. Martin Ramin/WSJ, Illustration: Serge Bloch
 
The Wall Street Journal tested a few ‘smart,' app-enabled masks to see if they're too much trouble — or a breath of tech air.
 

Read entire Week InReview: February 12, 2021

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