PROmotion of FLU Vaccine Uptake in the Emergency Department - PROFLUVAXED

Specific Aim I: To determine whether implementation of influenza vaccine trusted messaging platforms is associated with increased influenza vaccine uptake in unvaccinated ED patients. At six EDs (Zuckerberg San Francisco General, UCSF Parnassus Medical Center \[San Francisco, CA\], Thomas Jefferson University Hospital \[Philadelphia, PA\], Ben Taub Hospital \[Houston, TX\], Harborview Medical Center \[Seattle, WA\], and Duke University Medical Center \[Durham, NC\]), investigators will conduct a cluster-randomized controlled trial of implementation of PROFLUVAXED trusted messaging platforms, with influenza vaccine uptake in the ED as the primary outcome. Hypothesis: Implementation of PROFLUVAXED trusted messaging platforms in EDs will be associated with increased influenza vaccine uptake in unvaccinated ED patients. Specific Aim II: To determine whether implementation of influenza vaccine trusted messaging platforms in EDs is associated with increased influenza vaccine acceptance in unvaccinated ED patients. For this specific aim influenza vaccine acceptance in the ED assessed via ED survey will be the primary outcome. Hypothesis: Implementation of PROFLUVAXED trusted messaging platforms in EDs will be associated with increased influenza vaccine acceptance in unvaccinated ED patients. Specific Aim III: To determine whether implementation of a protocol in which ED patients are asked whether they will accept an influenza vaccine in the ED (and notifying ED providers when they say they will accept it) is associated with increased influenza vaccine uptake in unvaccinated ED patients. Hypothesis: Implementation of an ED protocol in which patients are asked whether they will accept an influenza vaccine (and notifying ED providers when they say they will accept it) will be associated with increased influenza vaccine uptake in unvaccinated ED patients.