Testing China KN95 & N95 Masks – Supplemental Data

This article accompanies our article on the reliability of KN95 masks being produced in China during the COVID-19 pandemic. It covers our testing method and provides the original data. China N95 Masks – Test Method During our mask tests, we followed as closely as possible the testing method used to …

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Sanitizing Masks With Alcohol Degrades Performance

With mask shortages during the coronavirus outbreak, some doctors are sanitizing masks with alcohol so they can re-use them. But this raises questions about whether alcohol actually works and whether it degrades the masks.   Does Alcohol Kill Viruses? The research on alcohol is clear. Alcohol kills viruses. Technically, viruses aren’t …

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Can I wash my N95 Mask?

Is Washing Masks Effective After Virus Exposure?

With the shortage of masks during the coronavirus outbreak, many people are wondering if washing masks is an effective way of cleaning and re-using masks. There are companies that claim to have washable anti-pollution masks. This company in India claims to have washable masks washable and can capture air pollution, …

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How Long Do N95 Masks Last? New Data

Scientific tests have found that simple pollution masks are incredibly effective, but how long do masks last? Most tests are done with brand new masks, so there’s very little data on used ones. And in that data vacuum, people have wildly different ideas about how masks remain effective. I’ve seen …

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Do kid's air pollution masks really work on children

How Effective Are Kid’s Masks at Filtering Air Pollution?

As cities like Delhi, Beijing and Manila face toxic levels of air pollution, people are rushing to find effective pollution masks, particularly kid’s masks. But there’s a problem. Children’s faces are different from adults’. Add to that, children are constantly growing, meaning that the mask that fit last year might …

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Surgical Mask Francis Totobobo

NPR Got These Facts About Masks Wrong

As wildfires were raging across the American West this summer, NPR ran a story on pollution masks people can use to protect themselves from all that air pollution. As a non-expert nerd who has dedicated years to understanding how to live under Beijing’s particulate cloud, I was eager to see …

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