How are Category A Infectious substances listed on the List of Dangerous Goods?

• A. Infectious substance, affecting humans
• B. Infectious substance, affecting animals
• C. Category A infectious substances
• D. Infectious substance, Category A

Answer: (D)

The listing uses a single, standardized label for Category A infectious substances: “Infectious substance, Category A.” This phrasing is the official entry on the List of Dangerous Goods that identifies materials in this most restrictive category and triggers the stricter packaging and handling requirements that apply to Category A shipments. The host species (humans or animals) is indicated separately by the UN numbers that accompany the entry (for example 2814 or 2900), but the List entry itself is the phrase “Infectious substance, Category A.” The other options try to describe the host instead of stating the standardized listing label, which is why they’re not the correct way the Category A items are listed.