Pentagon says Guam could be 1st target of Chinese missiles during Taiwan invasion ...

Scientists at Perm National Research Polytechnic University in Russia have developed a material that significantly reduces the weight of respirator filters designed to protect industrial workers from ...

A small blower fan is installed with the intake filter, to provide mild positive ... others from exhaled particles that can spread respiratory viruses. We’ve seen all kind of masks hit the ...

Respirators, more commonly known as face masks ... important during the coronavirus outbreak. "The N95 masks help filter out coronavirus particles so health care professionals aren't breathing ...