Comment on

• Evaluation of the national Cleanyourhands campaign to reduce Staphylococcus aureus bacteraemia and Clostridium difficile infection in hospitals in England and Wales by improved hand hygiene: four year, prospective, ecological, interrupted time series study.

  Stone SP, Fuller C, Savage J, Cookson B, Hayward A, Cooper B, Duckworth G, Michie S, Murray M, Jeanes A, Roberts J, Teare L, Charlett A. Stone SP, et al. BMJ. 2012 May 3;344:e3005. doi: 10.1136/bmj.e3005. BMJ. 2012. PMID: 22556101 Free PMC article.