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A Centralized Text Message Recall for Pediatric Influenza Vaccination, New York City, 2017

Iris Cheng1, Vikki Papadouka, Alexandra Ternier

  • 1Author Affiliations: Bureau of Immunization, New York City Department of Health and Mental Hygiene, Long Island City, New York (Ms Cheng, Dr Papadouka, Dr Ternier, Ms Langdon-Embry, and Dr Zucker); Division of Disease Control, New York City Department of Health and Mental Hygiene, Long Island City, New York (Dr Daskalakis).

Journal of Public Health Management and Practice : JPHMP
|July 21, 2026
PubMed

Insights

Text message reminders can increase influenza vaccination rates in young children. This study found a small but significant rise in flu shot uptake among children who received a centralized SMS reminder.

Area of Science:

  • Public Health
  • Preventive Medicine
  • Health Communication

Background:

  • Influenza vaccination coverage remains suboptimal nationwide, necessitating strategies to improve uptake.
  • Effective interventions are crucial for enhancing pediatric influenza immunization rates.

Purpose of the Study:

  • To assess the efficacy of centralized Short Message Service (SMS) text message recalls for influenza vaccination in children.
  • To evaluate the impact of text message interventions on pediatric influenza vaccination rates in New York City.

Main Methods:

  • A randomized controlled trial involving 149,860 children aged 15 months to 18 years from the Citywide Immunization Registry.
  • The intervention group received a generic SMS text message recommending annual influenza vaccination.
  • Vaccination status was compared between the intervention and control groups within 28 days post-intervention.

Main Results:

  • A statistically significant 9.5% relative increase in influenza vaccination uptake was observed in the intervention group compared to the control group (RR: 1.095).
  • Specifically, 4.7% of children aged 15 months to 4 years in the SMS group received the flu vaccine versus 4.3% in the control group.
  • The SMS text messages achieved a 73% delivery success rate.

Conclusions:

  • Centralized text message reminders demonstrated a small but positive effect on influenza vaccination rates in younger children.
  • This SMS-based approach represents a potentially valuable tool for improving influenza vaccination coverage in pediatric populations.
Abstract

Keywords:
centralizedimmunization information systeminfluenza vaccinationreminder/recalltext message

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