SEARCH Study: SMS and Automated Phone Reminders for HPV Vaccination in Uganda: Randomized Controlled Trial.
Sabrina B Kitaka1, Joseph Rujumba1, Sarah K Zalwango2,3
1Department of Pediatrics and Child Health, School of Medicine, College of Health Sciences, Makerere University, Kampala, UG.
JMIR Mhealth and Uhealth
|March 17, 2025
Summary
Text message and phone reminders significantly improved timely human papillomavirus (HPV) vaccination rates in Ugandan adolescents. This intervention is effective for increasing HPV vaccine uptake in low-income settings.
Area of Science:
- Public Health
- Preventive Medicine
- Vaccinology
Background:
- Cervical cancer is a leading cause of female cancer in Uganda, with late-stage diagnoses being common.
- Human papillomavirus (HPV) vaccination is crucial for primary prevention.
- Limited research exists on text message vaccine reminders for adolescents in Sub-Saharan Africa.
Purpose of the Study:
- To evaluate the effectiveness of text message and automated phone reminders with educational content on timely HPV vaccination.
- To assess the impact of these reminders in Kampala, Uganda, among adolescents.
Main Methods:
- A pilot randomized controlled trial involving 154 caregivers of adolescents due for HPV vaccination.
- Families were randomized to receive either intervention (text/phone reminders with education) or usual care.
- Vaccination status was assessed at 24 weeks using intention-to-treat analysis.
Main Results:
- The intervention group showed significantly higher rates of timely HPV vaccination (65.4% vs. 37.7%, p<0.001).
- Both text messages and automated phone calls were effective, with no significant difference between modes.
- The number needed to message for one additional vaccination was 3.6.
Conclusions:
- Automated text message and phone call reminders are effective tools for promoting timely HPV vaccination.
- This intervention shows promise for increasing HPV vaccine uptake in low- and middle-income countries.
- The study highlights a scalable and accessible method for improving vaccination coverage.


