Mobile App Arm
RECRUITMENT, INFLUENZA
Participants randomized to the mobile app arm received an email asking them to download the app and activate their account. Users who did not activate their account after 48 hours received a reminder email. Participants who activated their accounts could spontaneously report an AE through the app and were also notified of the day 8 survey through the app.Eight days following their vaccination, mobile app participants who activated their accounts received a push notification on their phone to complete their survey. A reminder push notice was sent out on day 11 to participants who had not yet competed the day 8 survey. On November 16, 2020 (midway through the recruitment period), additional email reminders in the mobile app arm were implemented on days 2, 4, and 6 to remind participants to register for the app. All participants received a day 8 email directing them to use their CANImmunize account to complete their influenza vaccine survey. Access to the survey link also was available in the email reminder.