Does wearing a face mask help to prevent COVID? Three and a half years after the pandemic began, here's what scientists have learned.
When the COVID-19 pandemic took off in 2020, so too did questions over the effectiveness of wearing a face mask to prevent the spread of the virus. Now, three and a half years later, what does the science say? In an interview for 60 Minutes, CBS News chief medical correspondent Dr. Jon LaPook posed that question to Linsey Marr, a Virginia Tech University professor specializing in aerosol science.
Virus particles must weave around the layers of fibers, and as they do so, they may crash into those fibers and become trapped. Marr likened it to running through a forest of trees. Walk slowly, and the surrounding is easy to navigate. But being forced through a forest at a high speed increases the likelihood of running into a tree. 'Masks, even cloth masks, do something,' she said.
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