Researcher turns ' SARS mask' into a virus killer
Hyo-Jick Choi, a professor in the University of Alberta Department of Chemical and Materials Engineering, noticed that many people wear a simple surgical-style mask for protection during outbreaks of influenza or other potentially deadly viruses such as severe acute respiratory syndrome (SARS) or Middle East respiratory syndrome (MERS).

Trouble is, the masks weren' t designed to prevent the spread of viruses.