6 Months and older, any sex, with Influenza or Respiratory Tract Infections. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Receipt of the Annual Influenza Vaccine Among Index PatientsPrimary· 6 months
Percent of patients with annual influenza vaccination (between 10/4/23 - 4/1/24) among adult patients. Outcomes will be assessed via vaccine data extraction from the electronic health record and external claims and pharmacy data.
The index patients must also be an active UCLA Health MyChart user (\>= 1 login over the last 12 months from 8/1/23, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis.
Group
Value
95% CI
Portal-Based PCP Video Reminder Message
3557
Portal-Based PCP Infographic Reminder Message
3518
Standard Health System Portal Messages
3479
Receipt of the Annual Influenza Vaccine Among Pediatric Index PatientsSecondary· 6 months
Percent of patients with annual influenza vaccination (between 10/4/23 - 4/1/24) among pediatric index patients. Outcomes will be assessed via vaccine data extraction from the electronic health record and external claims and pharmacy data.
The index patients must also be an active UCLA Health MyChart user (\>= 1 login over the last 12 months from 8/1/23, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis.
Group
Value
95% CI
Portal-Based PCP Video Reminder Message
618
Portal-Based PCP Infographic Reminder Message
598
Standard Health System Portal Messages
576
Sponsor's own description
This trial is taking place in Los Angeles, CA at 21 clinics within the UCLA Health System.
The study design is a 3 arm randomized trial. Patients will be randomized into 1) receiving portal based reminder messages with a video from their PCP encouraging them to receive the influenza vaccine, 2) portal-based reminder messages with an infographic with the image of their PCP encouraging them to receive the influenza vaccine, or 3) the control group. Patients randomized to the intervention arms will receive reminders if they are due for influenza vaccine.
Despite the Advisory Committee on Immunization Practices (ACIP) recommendation in 2010 that all people above 6 months of age should receive an annual flu vaccine, vaccination rates remain low: at 6m-4.9 yrs. (70%), 5-17.9 yrs. (56%), 18-64.9 yrs. (38%), and \>65 yrs. (63%). The investigators will assess the effectiveness of MyChart R/R video messages and infographic messages as compared to the standard of care control (Health system messages).
Publications & conference data
1 peer-reviewed publication reference this trial (live from Europe PMC):
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by University of California, Los Angeles
Last refreshed: 20 April 2025
Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT06062264.