Norovirus sickens between 19 and 21 million Americans each year.[1] In humans, norovirus is spread two ways—directly by person-to-person transmission, the most common route, or indirectly through contaminated food, water, or the environment.[2] While environmental transmission is reportedly low (0.35%), emerging evidence suggests contaminated surfaces play a more important role in the spread of norovirus than previously believed.[3] In fact, according to the U.S. Centers for Disease Control and Prevention (CDC), norovirus is the number one cause of diarrhea or vomiting outbreaks spread by direct contact with an infected person or through touching a contaminated surface. This is not surprising, given that a single vomiting episode can release 30 million virus particles into the environment.[4,5] Fecal matter contains even higher numbers of particles—104 to 1011 per gram—with sick individuals producing 500 g/feces per day. Consequently, if contaminated surfaces are not properly cleaned and disinfected, these surfaces could be a source of this highly infectious virus, possibly causing or prolonging an outbreak through residual environmental contamination.[6,7]