This week marks five years since March 13, 2020, the day President Donald Trump declared a national state of emergency over ...

SAN FRANCISCO -- Doctors say any mask is better than no mask, but cloth masks may not be getting the job done well enough against omicron. As cases surge, many are turning to N95 or KN95 masks to ...

The authors reviewed existing evidence for filtration efficiency of cloth masks vs medical masks, and they found that cloth masks fared surprisingly well. Layers matter, as does the material used.

Editor's Note: Denver7 360 stories explore multiple sides of the topics that matter most to Coloradans, bringing in different perspectives so you can make up your own mind about the issues. To comment ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

When a Texan farm worker caught bird flu from cattle recently, social media was abuzz with rumours. While bird flu is not a human pandemic, scientists and policymakers the world over are keen to ...