The Department of Health and Human Services, through the National Institutes of Health (NIH) and the National Institute of Allergy and Infectious Diseases (NIAID), is seeking small business contractors to conduct clinical studies focused on infectious agents, vaccines, and antivirals for both adult and pediatric populations. The primary objectives include evaluating the safety, immunogenicity, and efficacy of vaccines against various viruses, including emerging threats like Zika, with a project duration anticipated from August 2026 to August 2033 under a cost-reimbursement IDIQ contract structure. This initiative builds on decades of NIH-led research and aims to advance medical research through strategic partnerships with capable small businesses. Interested parties should submit their capability statements, including prior experience and qualifications, to the primary contact, Uju Obii-Obioha, at uju.obii-obioha@nih.gov, by the specified deadlines.