Hand washing and hand sanitizing are among the easiest behaviors to employ in an effort to avoid being affected by and spreading germs that can cause disease. On inanimate surfaces, we use disinfectants and bleach often to combat germs left on tables, doors, door handles, plumbing fixtures and other high-contact surfaces. But most only offer a fleeting defense in the form of killing existing germs. As soon as a germy hand, for instance, comes in contact with a disinfected surface, it most likely is re-contaminated and becomes once again a threat to spread germs and ultimately infections and illness. Using existing technologies that offer extended protection – and developing even better ones – is essential to making progress in the control of germs that cause infection and disease.