"...Xenex is a company that produces a germ-zapping robot that could be a beneficial support in fighting potential risks of contamination in hospital settings and address sterilizing spaces contaminated by Ebola. A video from the company explains what the machine does in general: the Xenex technology utilized is all about ultraviolet light, produced by the sun in three types, UV-A, -B and -C. The A and B types cause suntans and burns, but C is filtered by the ozone layer around the earth. As it does not occur in nature, bacteria and viruses have no defense against it. When germs are exposed to UV-C, the light kills the germs. The Xenex machine, once producing this light in a hospital room, can in five minutes drastically reduce germs in the room. The user stays outside the room; with prolonged exposure, UV-C could damage the eyes; the robot must always be run in an empty room. For additional safety, an orange cone stays outside of the room, as well as caution signs for the door. Inside the room, there is a gray cone that watches out for motion. Should motion be detected, the gray cone will turn the device off. The device is run when the room is empty after the patient is discharged and terminal cleaned. The xenon bulb —the Xenex robot utilizes pulsed xenon to create UVC light—will pulse for five minutes, disinfecting the area around the device. UV-C light cannot go through glass, walls or windows."