The effectiveness of financial incentives for COVID-19 vaccination: A systematic review.

"Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"The views expressed in this study are those of the authors and do not necessarily reflect the position or policy of the United States Department of Veterans Affairs (VA), Veterans Health Administration (VHA), or the United States Government. The contents of this article have not been previously printed or presented. This article was supported by the Office of Academic Affiliations, Advanced Fellowship Program in Mental Illness Research and Treatment, 10.13039/100000738Department of Veterans Affairs (Dr. Khazanov) and the Message Effects Lab, Annenberg School for Communication, University of Pennsylvania (Dr. Fishman). The funders had no role in study design, collection, analysis, interpretation of data, writing the report, or the decision to submit the report for publication. No financial disclosures or conflicts of interest were reported by the authors of this paper."

"The protocol for this review was published on PROSPERO in March 2022, following database searching and prior to screening records for inclusion (https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42022316086). We follow PRISMA reporting guidelines (Table S2) (). As this review is based on published studies, it was exempt from ethical compliance requirements. Registration: PROSPERO, CRD42022316086 (https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42022316086)."