While it's still important to wear a face mask in many situations, that mask won't be fully effective if it doesn't fit properly. That's why a team at MIT has designed a device to assess how well a ...

Please provide your email address to receive an email when new articles are posted on . Nearly 100% of N95 masks pass fit tests after 3 years, suggesting annual tests are not necessary. Moving to ...

So, about masks -- they do next to nothing if you don't wear them properly. Yep, even the cloth coverings touted as the best thing since social distancing have instructions. We've laid them out below, ...