Our project will assess the feasibility and estimate preliminary efficacy of a multilevel intervention to improve HPV vaccine series initiation among adolescents in Medicaid and CHIP. The investigators will use two intervention components: postcards and an iPad survey system. To estimate efficacy the investigators will select potential participants from Florida Medicaid and CHIP. The investigators will assess their claims for the HPV vaccine before and after the intervention.

Inclusion Criteria:

• Enrolled in Florida Medicaid
• Not initiated the HPV vaccine series at the start of the study period.

Exclusion Criteria:

• Anyone who has a severe (life threatening) allergy to any component of HPV vaccine, esp yeast
• Pregnant
• Not enrolled in Florida Medicaid