Parents' Enhanced Reminder Intervention to Improve Children's Timely Completion of Immunization Series of Pneumococcal Vaccine at the 12-month's Visit

The goal of this clinical trial is to assess the effectiveness of enhanced email reminders in improving vaccine coverage at the 12-month visit in CANImmunize app users. The main questions it aims to answer are:

• Do enhanced email reminders improve coverage of the 12- month dose of the pneumococcal vaccine and the timely completion of its immunization series at the 12-month's visit in CANImmunize app users?
• What are the predictors of predictors of timely completion of the 12-month's series of pneumococcal vaccines in the CANImmunize app users?

Participants will be randomized to either receive enhanced reminder/recall materials via email or the standard CANImmunize notifications. Researchers will compare the enhanced reminder group to the standard notification group to see if there is a difference in vaccine coverage at the 12-month visit.