Infectious substances that do not meet the criteria for Category A are categorized as what?

• A. Infectious substances that do not meet Category A criteria
• B. Exempt specimen
• C. Cultures
• D. Category B Substance

Answer: (D)

In this system, infectious substances are classified into two levels for transport. Category A covers substances that can cause permanent disability or life-threatening disease in healthy humans or animals and require the most stringent packaging and UN numbers. If an infectious substance does not meet those Category A criteria, it falls into Category B. Category B substances are still infectious and must be packaged and labeled correctly, but the requirements are less stringent than Category A. So the infectious substances that do not meet Category A criteria are categorized as Category B substances.