HPV Chatbots Did Not Outperform Public Materials

Overview

A randomized clinical trial found that brief interactions with a chatbot increased parents' short-term intentions to vaccinate their children against HPV. The study included 1,297 parents across the US, Canada, and the UK.

Background

Human papillomavirus (HPV) vaccination is crucial for preventing cancers linked to HPV, yet vaccination rates remain low. This study explores the effectiveness of chatbot interventions compared to traditional public health materials in influencing parental vaccination intentions.

Data Highlights

Key Findings

• All active interventions increased immediate HPV vaccination intent compared to no message.
• Public health materials produced the largest immediate effect on vaccination intent.
• Only public health materials maintained statistically significant intent increases at 45 days.
• Chatbot interactions did not increase actual HPV vaccination uptake at 15 or 45 days.
• Participants rated the default chatbot as more empathetic than public health materials.
• Lower-than-planned enrollment may have reduced the statistical power of the study.

Clinical Implications

The findings indicate that while chatbots can enhance immediate vaccination intent, they may not be as effective as established public health materials in sustaining that intent over time.

Conclusion

The study indicates that while chatbots can engage parents, traditional public health materials remain more effective in promoting vaccination intentions against HPV.

Related Resources & Content

1. JAMA Network Open, 2026 -- Large Language Model Chatbot Conversations vs Public Health Materials and Parental HPV Vaccination Intentions
2. The ASCO Post, 2025 -- Study Finds AI Chatbots Are Vulnerable to Spreading Malicious, False Health Information
3. DIGITAL HEALTH, 2026 -- Development of a cancer information chatbot model: Retrieval-augmented generation with data from the national center for cancer knowledge and information
4. AAP Immunization Schedule | Red Book Online | American Academy of Pediatrics
5. Evidence to Action, 2025 -- Single-Dose HPV Vaccination and Cervical HPV Infection
6. asco ai in oncology — How Well Do Patient-Facing Resources on AI and Cancer Measure Up?
7. Large Language Model Chatbot Conversations vs Public Health Materials and Parental HPV Vaccination Intentions
8. AAP Immunization Schedule | Red Book Online | American Academy of Pediatrics
9. Evidence to Action — Single-Dose HPV Vaccination and Cervical HPV Infection | New England Journal of Medicine