Donald Milton tests people for colds and flu in his lab at the University of Maryland. Among other experiments, his students use a “sneeze machine” to measure how far viruses fly out of the nose and mouth when people sneeze, cough, talk or just breathe. It means a parade of students infected with a variety of contagious diseases coming through.
So installed in the ceilings of some of the offices are germ-killing ultraviolet-C lamps. High above where people circulate, the lamps emit ultraviolet light that, given some time, can kill bacteria and fungi and break apart viruses.