The National Institute of Allergy and Infectious Diseases (NIAID) intends to negotiate on a sole source basis with Government Scientific Source, Inc. to acquire one Cytek Aurora system with a 5-laser system for its facility at the Rocky Mountain Laboratories (RML) in Hamilton, Montana. The system is essential for maintaining continuity in scientific research, ensuring data integrity, and upholding experimental compatibility with existing equipment and critical protocols. The key features of the system include a 5-laser flow cytometer, workstation, and 1-year on-site warranty. The estimated period of performance for this requirement is from July 15, 2025, to July 14, 2026. • The system will enhance the capabilities of the BSL-3 lab within its bio-safety cabinet, supporting integral research performed at the RTB. • The system will facilitate human and primate studies across multiple locations, ensuring continuity in data collection and analysis. • The system will support the RTB's mission to advance scientific knowledge and improve public health through cutting-edge research.