- Conditions
- Booster Message, Booster Message + Financial Incentive
- Interventions
- Messaging, Financial Incentive, Placebo
- Behavioral · Other
- Lead sponsor
- University of Southern California
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 57,893 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022
- U.S. locations
- 1
- States / cities
- Martinez, California
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- Conditions
- COVID-19, Vaccines
- Interventions
- Reminder that facilitates action, Consistency framing, Information provision about the uniqueness of the bivalent booster, Information provision about bivalent booster eligibility, Information provision about the severity of COVID-19 symptoms
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 177,720 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- COVID-19, Vaccines
- Interventions
- Reminder to boost protection against COVID-19, Flu Tag Along, COVID-19 Booster & Flu Bundle
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 109,493 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- COVID-19, Vaccines
- Interventions
- Eligibility reminder, Link to a narrow set of vaccine venues, Link to a broad set of vaccine venues, Doctors' recommendation and value of vaccine
- Behavioral
- Lead sponsor
- University of California, Los Angeles
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 154,977 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2022 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California