Reducing Delay of Vaccination in Children Study

This intervention is based on the concept of "message tailoring," whereby each mother is
provided with individually customized vaccine- related information that addresses their
unique concerns, values, questions and logistical barriers. Message tailoring is an
evidence-based health messaging strategy that has been shown to improve compliance with a
wide variety of preventive health care behaviors among diverse patient populations.

In this three-armed trial the investigator will examine how providing mothers with multiple
"doses" of a tailored versus untailored version of our intervention compares with "usual
care" for the impact on infant under-vaccination. Secondary outcomes will include maternal
vaccine-related attitudes (including level of vaccine hesitancy), alignment of maternal
values with provider recommendations, and self-efficacy for overcoming logistical barriers to
vaccination.

Inclusion Criteria:

- Enrolled at Kaiser Permanente Colorado, Pregnant in the 3rd trimester, and plan to use
Kaiser Permanente Colorado for the child's medical care received.

Exclusion Criteria:

- less then 18 years of age, non-english speaking and an inability to consent