According to the IATA flowchart, what category is assigned to the Zika Virus sample?

• A. UN3373
• B. Non-infectious
• C. Category B
• D. Category A

Answer: (C)

In air transport, infectious substances are split into two categories based on risk. Category A is for materials that, if released, could cause a life‑threatening disease or permanent disability. Category B covers diagnostic or clinical specimens that are infectious but do not meet the criteria for Category A.

A Zika virus sample, typically a diagnostic specimen from a person, is usually shipped as Category B (UN3373). This reflects that, while the material may contain infectious virus, it does not meet the higher risk threshold required for Category A, and is handled with standard packaging appropriate for Category B shipments. If the material truly met Category A criteria, it would be classified accordingly, but routine diagnostic specimens like this are assigned to Category B.