Breathe easy. A new study suggests that surgical face masks don’t cause a buildup of carbon dioxide or restrict oxygen, despite opposing claims. The study, on the “Effect of Face Masks on Gas Exchange ...

Some face masks contain minute quantities of titanium dioxide, a mineral that has been flagged as a possible cancer risk when inhaled, but there is no evidence that mask users inhale it at all, or in ...

One common concern about cloth face masks is the level of filtration they provide. The fabric’s mesh is often too open to filter out smaller particles such as smoke, dust, or viruses. A popular ...

"WARNING UNMASK YOUR KIDS! Any Carbon Dioxide concentrations above 2000ppm is dangerous!" The post was flagged as part of Facebook’s efforts to combat false news and misinformation on its News Feed.

A new school year is underway in many parts of the United States and in several school districts, children are meeting in person for the first time since the coronavirus pandemic was declared by the ...