Skip to main content
OpenTrials
Completed

NCT Number: NCT07096245

Conectados: Social Networks and Social Media for Vaccine Uptake

This study is testing different ways of sharing a short, community-informed video about flu and COVID-19 vaccines to see how people respond to it. The video was created with input from Indigenous community members in California and provides information to support vaccine decision-making. Participants may see the video in one of three ways: through a paid advertisement on social media, from a trusted community organization, or from someone they know personally. After watching the video, viewers will be asked to answer one question about how much they trust it, and they may choose to complete a short survey about their vaccine views and how they received the video. The goal is to understand how trust in vaccine information changes depending on who shares it, and to improve the way health messages are delivered to Indigenous and other underserved communities.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Vaccination

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of California, San Francisco

San Francisco, California, 94158, United States

About this study

This is a randomized dissemination trial evaluating the impact of different message delivery strategies on trust, attitudes, and behavioral intentions related to flu and COVID-19 vaccination. The intervention consists of a short (approximately 2-minute) culturally tailored video, developed using human-centered design and community-based participatory approaches with Indigenous communities in California.

Participants are exposed to the video through one of three dissemination arms: (1) paid advertisements on Facebook and Instagram targeting adults 65 and older in California; (2) peer-to-peer sharing by "seed" participants recruited from a prior phase of the study; and (3) community-based organization (CBO) outreach using established communication channels. All participants view the same video.

After viewing the video, participants are asked to respond to a single poll item ("How much do you trust this video?") and are invited to complete an optional, anonymous online survey assessing vaccine confidence, trust in the information source, and willingness to share the video. Survey responses are linked to the dissemination arm for comparative analysis.

Seed participants receive personalized, trackable video links and instructions to share them with at least 10 contacts in their network. Click-level analytics (e.g., timestamp, referral source, general location) are collected through Bitly or Rebrandly links. YouTube analytics will also be used to evaluate video engagement (e.g., views, retention, traffic source). No identifiable health information is collected unless participants voluntarily provide contact information to complete the survey by phone.

The primary outcome is the level of trust in the video across dissemination arms. Secondary outcomes include survey completion rate, willingness to share the video, and changes in vaccine-related attitudes. Data will be stratified by dissemination method and, for seed participants, linked to prior social network data collected in Phase 1.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age 18 years or older
  • Currently resides in California
  • Able to access and view an online video
  • Able to complete an online survey in English or Spanish For Arm 2 only (Participant Seed Arm): must have participated in the prior Aim 1 survey and consented to recontact

Exclusion criteria

  • Under 18 years of age
  • Does not reside in California
  • Unable to access the internet to view the intervention video or complete the survey

Treatment and study plan

Vaccine Information Video Dissemination

Behavioral

The intervention is a brief, community-informed educational video (2-3 minutes) focused on seasonal flu and COVID-19 vaccination. The video was developed using human-centered design and community-based participatory methods with Indigenous community members in California. It aims to promote trust in vaccines by presenting clear, culturally relevant health information.

The video is disseminated using three behavioral delivery strategies: (1) paid advertisements on Facebook and Instagram targeting adults in California, (2) peer-to-peer sharing by participants who previously enrolled in the study and are invited to serve as "seeds" who share the video with their personal contacts, and (3) distribution by trusted community-based organizations (CBOs) using their existing communication networks, including WhatsApp, social media, email, and newsletters. All viewers are prompted to complete a one-question trust poll and invited to participate in an optional anonymous survey on vaccine attitud

Primary outcomes

  1. Trust in vaccine video message by dissemination arm

    Time frame: immediately after exposure

    Participants will be asked to answer a single poll question after viewing a 2-3 minute vaccine education video: "How much do you trust this video?" Responses will be collected on a 4-point Likert scale (Not at all, A little, Mostly, Completely). The primary outcome is the level of trust reported, compared across dissemination arms (paid social media ads, peer-to-peer sharing, and community-based organization distribution). Analysis will assess differences in trust levels based on who shared the video.

  2. Intention

    Time frame: Immediately after video exposure

    Assesses participants' reported likelihood of getting a seasonal flu or COVID-19 vaccine after viewing the intervention video. Measured on a 6-point scale from "Very unlikely" to "Very likely," including an option for participants who have already received the vaccine. Analysis will examine variation by dissemination arm and correlation with trust in the video.

Secondary outcomes

  1. Self-reported exposure to new information

    Time frame: Immediately after video exposure

    Participants are asked whether the video provided them with new information related to flu or COVID-19 vaccines. This binary outcome (Yes/No/Not sure) helps assess the video's educational value.

  2. Trust in message source

    Time frame: Immediately after video exposure

    Assesses how much participants trust the person or group from whom they received the video. Measured on a 4-point scale (Not at all, A little, Mostly, Completely).

Sponsors and collaborators

Lead sponsor

University of California, San Francisco

Other

Registry information

Acronym: Conectados

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Jul 31, 2025
Registry last updated
Mar 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.