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KF94

Those KN95 masks you just bought might not meet testing standards

by Kai Ryssdal and Maria Hollenhorst
Jan 20, 2022
We go shopping for face coverings with a self-professed “mask nerd”
A discarded face mask is seen on the ground. It can be difficult for consumers without specialized testing equipment to verify the quality of masks they purchase.
David Gannon/ Getty Images
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