Health-care associated infections are a threat to patient safety and the most common adverse events resulting from a stay in the hospital.1 Approximately 5 to 10 of hospitalized patients in the developed world acquire such infections, and the burden of disease is even higher in developing countries. Proper use of hand hygiene is a critical to the prevention of these infections, but compliance among health care workers is most often below 40.... br br VIDEOS IN CLINICAL MEDICINE The New England Journal of Medicine, Yves Longtin, M.D., Hugo Sax, M.D., Benedetta Allegranzi, M.D., Franck Schneider, and Didier Pittet, M.D. br N Engl J Med 2011; 364:e24March 31, 2011DOI: 10.