This document provides an overview of hand hygiene for healthcare workers. It discusses the who, what, where, why, when and how of proper hand hygiene practices. The presentation reviews important points about hand hygiene including identifying situations that require hand hygiene, describing proper techniques, and emphasizing the importance of hand hygiene in preventing spread of infection. It highlights that hand hygiene should be performed before and after contact with patients or the patient environment according to the "Four Moments" approach.