It's just two masks to stop the spread. If we all wore three masks, we can save lives. If you believe in science, you'll put on four masks. Don't be a conspiracy theorist.
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It's just two masks to stop the spread. If we all wore three masks, we can save lives. If you believe in science, you'll put on four masks. Don't be a conspiracy theorist.
Virginia Tech researchers found that wearing two masks can increase mask efficacy from 50% to 75%, and wearing three masks can increase efficacy to 90%. https://www.cnbc.com/2021/01/26/covid-live-updates.html