Which of the following items would NOT require a biohazard warning label?

A unit of blood released for clinical use does not require a biohazard warning label because it is considered to be safe for transfusion to patients. When blood products are processed and tested, they undergo rigorous screening and evaluation to ensure their safety and infectious status. As such, when these units are deemed safe for clinical use, they are no longer considered potentially infectious and do not need a biohazard warning label.

In contrast, contaminated sharps containers, refrigerators containing potentially infectious materials, and receptacles for contaminated laundry all contain or potentially contain biological hazards. These items must be clearly labeled with biohazard warnings to inform and protect personnel who may come into contact with them. Such labels indicate that the contents are capable of causing infection, require special handling, and adhere to safety protocols for disposal and management.