(The Korea Advanced Institute of Science and Technology (KAIST)) A KAIST research team announced that they have developed a nano-filter that maintains excellent filtering efficiency even after hand washing through the development of proprietary technology that aligns nanofibers with a diameter of 100~500 nm in orthogonal or unidirectional directions. This reusable nano-filtered face mask could help to relieve the challenges arising from the supply shortage of face masks.

Original source: https://www.eurekalert.org/pub_releases/2020-03/tkai-rnf031720.php