During the 2010-2011 and the 2011-2012 seasonal influenza immunization campaigns, we will recruit a minimum of 46 healthcare organizations to either conduct their campaigns as usual or to use the "Successful Influenza Immunization Campaigns for Healthcare Personnel: A Guide for Campaign Planners and a web-based grab-and-go Tool Kit. At the end of the campaign season we will evaluate the impact of the Guide and web-based tools and assess whether there were changes in immunization rates within each organization and/or if there were significant changes in the management of the campaigns across organizations.