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Volatility and Heterogeneity of Vaccine Sentiments Means Continuous Monitoring is Needed When Measuring Message Effectiveness

NCT05499299 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 127000

Last updated 2022-08-16

No results posted yet for this study

Summary

The success of vaccination programs often depends on the effectiveness of the vaccine messages, particularly during emergencies such as the COVID-19 pandemic. The current suboptimal uptake of COVID-19 vaccines across many parts of the world highlights the tremendous challenges in overcoming vaccine hesitancy and refusal even in the context of a world-devastating pandemic. The investigators conducted a randomized controlled trial in Hong Kong to evaluate the impact of seven vaccine messages on COVID-19 vaccine uptake (with the government slogan as the control). The participants included 127,000 individuals who googled COVID-19-related information during July-October 2021.

Conditions

  • Vaccine-Preventable Diseases
  • Vaccine Refusal

Interventions

BEHAVIORAL

Google ads

Individuals who googled COVID-19 information in Hong Kong were randomized to see one of the seven ads and, if they clicked on the ads, the corresponding vaccine message on our website

Sponsors & Collaborators

  • The University of Hong Kong

    lead OTHER

Principal Investigators

  • Joseph T Wu, PhD · The University of Hong Kong

Study Design

Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
SINGLE
Model
PARALLEL

Eligibility

Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2021-07-01
Primary Completion
2021-10-31
Completion
2022-04-01

Countries

  • Hong Kong

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05499299 on ClinicalTrials.gov