The trial will investigate to what extent SMS reminders for influenza vaccination increases coverage of influenza vaccination among elderly from the majority population, and among elderly from immigrant groups with low vaccination coverage
Aged 65+ (age at the end of 2025, i.e., born 1960 or earlier)
Resident in Norway and have a valid ID number on 1 September 2025
Have a registered mobile phone number
Have received the 2025 influenza vaccine prior to the SMS nudge dispatch date
Have emigrated or died before SMS nudge dispatch date
Norwegian Institute of Public Health
Lead sponsor
University of Oslo
Collaborator
Finnish Institute for Health and Welfare
Collaborator
University of Turku
Collaborator
University Hospital, Akershus
Collaborator