Name: Why wearing a mask actually works
Uploaded: Tue Jun 16 2020 12:48:06 GMT+0000 (UTC)
Duration: 4 min 37 s
Description: Masks and face coverings have become a standard for many as the CDC recommends using them to help protect you and the people around you from the coronavirus. So just how much of a difference does a mask make? NBC News investigative and consumer correspondent Vicky Nguyen takes an eye-opening look.

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June 16, 202004:37