Date	Event	Description
4 June 2014	New search has been performed	Searches updated. We included 13 new trials (Abramson 2011; Dapp 2011; Garcia‐Aymerich 2007; Humiston 2011; Kumar 1999; Maglione 2002a; Maglione 2002b; Maglione 2002c; Maglione 2002d; Minor 2010; Moran 1996; Morrissey 1995; Roca 2012) and identified two potentially relevant trials which are awaiting translation (Lee 2003; Song 2000).
4 June 2014	New citation required and conclusions have changed	In this update we concluded that letters and postcards, tailored letters/postcards or phone calls, educating patients, home visits, offering free vaccination, some reminders to physicians, paying physicians for improved vaccination rates and using facilitators in clinics were all effective in increasing influenza vaccination rates. However, using educational reminders and feedback to physicians were not effective.