Something stinks...
gasmasks were first introduced during the First World War as precautionary measures for soldiers. And though weapons have become much smarter, advanced and lethal since then, gasmasks still remain where they were almost a century ago. Most gasmasks available today use one or several filters to purify the air the wearer breathes in. These might be acceptable in regular industrial circumstances where contaminated air is not a problem. But in situations that demand more stringent air purification, a biochemical weapons site for instance, these masks offer very little protection against minute germs and viruses.
Now, us -based scientists have developed