Medical face masks can feel almost impossible to keep on properly. Wearers constantly touch them to readjust, move them to scratch their faces, and regularly take them off and put them back on.
All of those actions can help the germs on a mask’s surface get into your body. Experts say that for most people outside of Wuhan, China, face masks are unlikely to protect you from the current coronavirus outbreak, for example.
But Hyo-Jick Choi, a biomedical engineer and professor at the University of Alberta in Canada, says he has a potential solution: A mask that can kill harmful pathogens, rather than just block them. The secret ingredient is table salt…..more