UNSPSC 51201600: Vaccines and antigens and toxoids

This classification denotes a) suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa, or rickettsiae), antigenic proteins derived from them, or synthetic constructs, administered for the prevention, amelioration, or treatment of infectious and other diseases; b) substances that are recognized by the immune system and induce an immune reaction; or c) preparations of pathogenic organisms or their derivatives made nontoxic and intended for active immunologic prophylaxis.

UNSPSC 51201600 Vaccines and antigens and toxoids is a Class code under which state and local health agencies procure immunization products for public health programs. The Mississippi State Department of Health posted a sole source notice on July 13, 2026 for Yellow Fever Vaccine from Sanofi Pasteur, Inc., with an objection deadline of August 3, 2026. State health departments are the primary issuing body soliciting under this code, and procurement activity centers on vaccines required for disease prevention and immunization mandates across public health systems.

The source contains a single recent opportunity, limiting visibility into broader geographic patterns and issuing-body concentration. The Mississippi Department of Health notice represents the only documented state and local procurement activity in the recent-opportunities dataset for this code. The sole source designation process permits third parties to object and demonstrate alternative suppliers; if substantiated objections are received, Mississippi will conduct a competitive RFP or selection process. The notice does not disclose quantity, contract term, or estimated value, which restricts assessment of market scale under this code.