UN2814 (Category A, Infectious Substance Affecting Humans)
Also: UN2814, Category A
The dangerous-goods entry for an infectious substance carried in a form capable of causing permanent disability, or life-threatening or fatal disease, in otherwise healthy humans.
Category A is a judgement rather than a lookup. The regulations require the assignment to rest on the known medical history and symptoms of the source, endemic local conditions, or professional judgement about the individual circumstances. The indicative list of organisms is not exhaustive, and much of it applies to cultures only, so the same organism can fall either side of the line depending on the form it is in.
UN2814 carries the full dangerous-goods regime: UN-certified triple packaging under Packing Instruction 620, a Class 6.2 label, a declaration, and a trained and current shipper. In practice it also needs a carrier that has agreed in advance to accept Category A on that lane, which is commercial policy rather than regulation but stops just as many shipments. Where the material affects animals only, the entry is UN2900 instead.
Where the capability of the material is not established, the doubt is resolved upwards and the substance is carried as Category A. Work it through with the free infectious substance classifier, which shows the clause behind each step.