Parents will receive usual care for their child at Kaiser Permanente Colorado. This includes recommendations for well child visits at 2, 4, 6 and 12 months of age as well as automated reminders for age eligible children to receive the flu shot during flu season.

Parents randomized to the reminder arm will receive automated reminders to complete a 6 month and 12 month vaccine visit for their child. They will receive 2 reminders before the child is 6 and 12 months of age and 2 reminders after their child is 6 and 12 months of age. Reminders will not occur if they have received vaccines within the eligible time frame to receive a vaccine or have a visit scheduled. After randomization, participants in the intervention arm will have an opportunity to provide their preference on how they receive reminders (text, phone and/or email). Participants not providing a preference will receive text reminders. If a child is randomized into the study after the child is 7 months of age, the parent will only be eligible for reminders for the 12 month vaccine visit.

Automated reminders for the 6 month and 12 month vaccine visits for parents experiencing logistic barriers to vaccination.

Vaccination records from the participants electronic health record will be used to measure vaccines received. Vaccines received is a dichotomous variable indicating if any vaccines were received while enrolled in the study

Vaccination records from the participants electronic health record will be used to measure vaccine dose. Vaccine dose is a measure of the vaccine doses that the child could have received while enrolled in the study, the number of vaccine doses received