©2024 Stanford Medicine
COVID-19 Messaging for Vaccination
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
Associate 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
Recruiting
Contact Information
Stanford University
School of Medicine
300 Pasteur Drive
Stanford,
CA
94305