Screen Shot 2020-04-04 at 08.34.07.pngDemand is through the roof for protective face masks in South Korea… as fears linger over how the coronavirus outbreak will unfold in the coming weeks and months. Shelves have been stripped bare and limits have been set on how many people are allowed to buy. However, some help may be at hand as South Korean researchers have developed a reusable mask filter that maintains its function… even after multiple washes. That said, the mask requires government approval before it can be commercialized. Park Se-young has more. This mask filter, which can be placed inside a cotton mask, …was developed to maintain its efficiency even after more than 20 washes using soap…..more