NCT05648773

COVID-19 Booster Incentives

COVID-19 Booster Incentives in a County-Run Health System

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 57,893 (actual)
• Sponsor: University of Southern California · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The goal of this work is to understand whether small financial incentives and messaging can increase the take-up of COVID-19 boosters among patients empaneled at a county public health system. The motivation for this work is the relatively low take-up of COVID-19 boosters. In California, where our experiment is based, only 59% of the population has been boosted, with only 13% receiving the recommended bivalent booster (State of California, 2022).

Conditions

• Booster Message
• Booster Message + Financial Incentive

Interventions

Type	Name	Description
BEHAVIORAL	Messaging	Booster reminder message
BEHAVIORAL	Financial Incentive	Financial Incentive for getting boosted within 2-weeks of the message
OTHER	Placebo	Treatment as usual; no additional message and no incentive.

Timeline

• Start date: 2022-12-08
• Primary completion: 2022-12-23
• Completion: 2022-12-23
• First posted: 2022-12-13
• Last updated: 2023-08-14

Locations

1 site across 1 country: United States