Which mode of transport is mentioned in relation to shipping a tissue sample for HLA typing under these rules?

• A. Air transport with dry ice
• B. Ground transport only
• C. Ocean freight
• D. Postal mail

Answer: (A)

Shipping tissue samples for HLA typing needs to keep the material cold while meeting biological substance shipping rules. Dry ice provides a solid, effective coolant, and air transport is the mode designed to accommodate shipments that use dry ice within regulatory packaging limits. This combination ensures the sample stays at the required temperature during the relatively fast transit that air offers, which helps preserve the tissue’s viability for accurate typing. Ground transport, ocean freight, or postal mail typically don’t align with these regulatory requirements for time-sensitive, temperature-controlled biological materials, making air transport with dry ice the appropriate choice.