Researchers find the best-performing materials for homemade masks were blackout drapery and sterilization wrap widely used for packing surgical instruments
Researchers have developed a special type of cotton face mask that kills up to 99.9999 percent of bacteria and viruses within 60 minutes of daylight exposure
Investigators have developed and tested the respirator, which can be sterilized, used in a hospital setting, and earned a 100 percent success rate for fit testing