The U.S. government is seeking information on "Protection Before Day One" vaccines that provide both seasonal influenza protection and partial protection against emerging pandemic strains, addressing the critical gap between pandemic onset and strain-matched vaccine deployment. The Center for the Biomedical Advanced Research and Development Authority (BARDA) aims to understand the development maturity, technical feasibility, manufacturing readiness, and regulatory considerations of candidate vaccines. No specific budget amounts or performance location are mentioned in this Request for Information (RFI). The focus is on vaccines that could reduce individual hospitalization risk by 35% even with modest effectiveness, while also delaying pandemic peaks to allow time for strain-matched vaccines. This RFI is for information-gathering purposes only, with no submission deadlines or bid timelines specified.