Impact of a peer comparison intervention on seasonal influenza vaccine uptake in community pharmacy: A national cluster randomized study.

Background: Seasonal influenza vaccine (SIV) uptake in the United States remains suboptimal, requiring new and innovative strategies.

Objective: To evaluate the impact of a behavioral peer comparison (PC) intervention on SIV uptake in community pharmacies across the United States.

Methods: A cluster randomized study was conducted across a national network of Walmart community pharmacies (> 4500 sites) during the 2019-2020 influenza season.