NCT05499299View on ClinicalTrials.gov

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

NACompletedINTERVENTIONAL

Enrollment

127,000

Participants

Timeline

Start Date

July 1, 2021

Primary Completion Date

October 31, 2021

Study Completion Date

April 1, 2022

Conditions

Vaccine-Preventable DiseasesVaccine 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

Trial Locations (1)

Unknown

The University of Hong Kong, Hong Kong

All Listed Sponsors

lead

The University of Hong Kong

OTHER