Reframing Adolescent Under-Vaccination as a Delivery-System Transition Problem: A Response to Deck et al.

Area of Science:

• Public Health
• Health Systems Research
• Vaccinology

Background:

• Adolescent vaccine hesitancy is often cited as a primary driver of suboptimal immunization coverage.
• Previous research has focused on individual-level factors influencing vaccine uptake in adolescents.

Purpose of the Study:

• To reframe adolescent vaccination uptake as a health system delivery challenge rather than solely a behavioral issue.
• To analyze patterns in adolescent vaccine coverage related to health system transition points.

Main Methods:

• Analysis of adolescent vaccination data, examining uptake patterns across different age groups and cohorts.
• Comparison of influenza and HPV vaccine coverage rates.
• Evaluation of vaccine uptake among recent immigrants and its relation to established delivery pathways.

Main Results:

• Uniformly low influenza uptake contrasted with higher HPV coverage in younger cohorts.
• A significant decline in vaccine coverage among older adolescents after exiting school-based programs.
• Poorer vaccine uptake among recent immigrants, suggesting gaps in newcomer-specific immunization services.

Conclusions:

• Adolescent under-vaccination is linked to transitions out of school-based programs, missed catch-up opportunities, and fragmented newcomer health pathways.
• Health system delivery, including school-based programs and registry-supported follow-up, significantly impacts adolescent immunization rates.
• Policy should focus on transition-sensitive service redesign, structured catch-up pathways, and improved integration of services for youth and newcomers.