“…Ensuring the comparability of results depends, to a great degree, on the types of observer, the level and type of training that the observers receive, the duration of observation periods, and the number of HH opportunities observed [13,23]. Given these limitations, there is considerable interest in new technologies for audit and feedback of HH compliance, including electronic and video monitoring systems [24]. These new systems vary widely, ranging from simple systems that track only the number of times that soap or hand sanitizer is dispensed to complex systems that integrate information on the timing of HH dispensing events and the location of the HCW in order to provide an estimate of HH compliance [24].…”