The Immunization Summary is an app for visualizing data (tables, graphs, maps) on policies, activities and impact of national immunization systems. These data are reported by WHO & UNICEF Member States annually for incidence, coverage, immunization system indicators and vaccination schedules. The WHO-UNICEF estimates of national immunization coverage constitute an independent technical assessment of coverage. Data are available from 1980 to 2012 (as of July 2013) for 195 countries or territories. Data from 1980 to 2013 will be available in July 2014. Please watch the immunization summary preview at: http://multimedia.who.int/mp4/WHO-TRA_Immunization_surveillance_application_13MAR2014.mp4 Do not Forget to rate the app. Please share with us your comments and suggestions.