Which element is NOT part of the triple packaging for Category A infectious substances?

• A. Absorbent material
• B. Double-layer waterproof outer packaging
• C. Documentation enclosed by outer packaging
• D. A single layer of protective cardboard

Answer: (D)

In Category A shipments, the packaging must have three containment layers to prevent any release during transport: a leakproof inner primary container, a secondary packaging that surrounds the primary container and includes absorbent material, and an outer rigid, leakproof packaging that provides cushioning. Documentation is placed with the outer packaging so it travels with the package. The option described as a single layer of protective cardboard does not provide the necessary multiple-layer, leakproof containment or cushioning features required for triple packaging. Therefore, that element is not part of the triple packaging.