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COVID-19 Messaging for Vaccination
Not Recruiting
Trial ID: NCT05182554
Purpose
This study will distribute videos of health professionals encouraging Covid-19 vaccination to a large sample of Facebook users, and will test the most effective ways to maximize diffusion of this vaccine-related content to increase vaccination rates. The study sample will be U.S. states where vaccination rates remained low in fall 2021. The experimental design is an RCT with 4 groups, randomized at the county level: 1) a control group which receives no intervention, 2) a treatment group in which Facebook users receive ads which include videos of health professionals telling them to get vaccinated, 3) a treatment group in which Facebook users receive ads which include videos of health professionals encouraging them to help their friends to get vaccinated, and 4) a treatment group in which Facebook users receive ads which include videos of health professionals encouraging them to get their most influential friends to help their friends get vaccinated. In treatments 3 and 4, participants will have the option to sign up to be a "vaccine ambassador," in which case they will get notifications when the study team posts new vaccine-related content, and will receive reminders about encouraging their friends to be vaccinated. The vaccine ambassadors will also be entered into a lottery to win prizes. The study team is building a website to host the videos of health professionals which answer common questions about Covid-19 vaccination. The investigators will measure engagement with the vaccine-related content as well as assess effects on vaccination rates at the county level.
Official Title
Increasing the Effectiveness and Diffusion of COVID-19 Messaging for Vaccination
Stanford Investigator(s)
Richard Hoppe
Henry S. Kaplan-Harry Lebeson Professor of Cancer Biology
Eran Bendavid
Professor of Medicine (Primary Care and Population Health), of Health Policy, Senior Fellow at the Woods Institute for the Environment and, by courtesy, at the Freeman Spogli Institute for International Studies
Golara Honari, MD
Clinical Associate Professor, Dermatology
Eligibility
Inclusion Criteria:
* Facebook user
* Over 18 years old
* In a geographic area targeted by the study
Exclusion Criteria:
-
Intervention(s):
behavioral: Doctor Videos
behavioral: Sharing Videos
behavioral: Sharing Videos (Influencers)
behavioral: Vaccine Ambassador
behavioral: Video framing
behavioral: Video order
Not Recruiting
Contact Information
Stanford University
School of Medicine
300 Pasteur Drive
Stanford,
CA
94305