UNSPSC 51201800: Immunostimulating agents

This classification denotes drugs or other preparations that engender a natural but heightened imune response, or formulations for presenting an antigen to induce specific immunologic responses. it consists of an assembly of antigens in multimeric form. the assembly is attached to a matrix with a built-in adjuvant, saponin. iscoms induce strong serum antibody responses, and are used as highly immunogenic forms of subunit vaccines.

UNSPSC 51201800 Immunostimulating agents is a Class code under which state and local health departments procure vaccines and related immunological products. The Mississippi State Department of Health recently posted a sole source notice for Yellow Fever Vaccine from Sanofi Pasteur, Inc., indicating that state health agencies use this code to acquire specific vaccine products when they determine a single manufacturer meets clinical or regulatory requirements. The scope of work encompasses the procurement of vaccines and immunostimulating pharmaceutical agents for public health programs, typically driven by established immunization schedules, disease prevention mandates, or emergency response protocols. Issuing bodies under this code are primarily state health departments and subordinate public health agencies responsible for vaccine procurement and distribution.

Recent activity shows limited competitive solicitation volume under this code. The Mississippi State Department of Health's July 13, 2026 sole source notice for Yellow Fever Vaccine (due August 3, 2026) represents the only identifiable recent opportunity; the notice specifies that objections to sole source classification must be submitted in writing to the department's purchasing office, with the department's burden to prove exclusivity if challenged. The notice does not disclose quantity, contract term, or estimated value. No other state or local opportunities appear in the recent posting record, suggesting that immunostimulating-agent procurement operates through formulary management, standing agreements, or centralized state purchasing rather than frequent open-market solicitations. Geographic activity is limited to Mississippi based on available records.