10. The primary objective of this study is to evaluate the efficacy of 3 hand hygiene protocols: hand-rubbing with alcohol covering all hand surfaces, hand-rubbing with alcohol using the standard 7-step technique, and hand-washing with chlorhexidine using the standard 7-step technique. The secondary objectives include the estimation of time spent on hand hygiene, for each hand hygiene protocol; and the evaluation of bacterial hand contamination after key patient care activities.