What is the best definition of the term "biohazard"?

The term "biohazard" is best defined as materials that can transmit disease. In a healthcare setting, biohazard refers specifically to biological substances that pose a threat to the health of living organisms, primarily humans. This includes any waste or materials that may harbor pathogens—such as bacteria, viruses, or other microorganisms associated with diseases.

This definition is crucial for healthcare workers, including Certified Nursing Assistants, as they are tasked with handling potentially infectious materials, ensuring that they follow strict protocols for safety and disposal. Recognizing what constitutes a biohazard helps prevent the spread of infections and protect the health of patients and staff.

In contrast, the other provided choices focus on aspects that do not encompass the full scope of what a biohazard is. Non-infectious substances and non-hazardous medical waste do not pose a risk of disease transmission, thereby lacking the primary concern associated with biohazards. Materials that can cause injury might include a broader range of items, but do not necessarily relate to infectious risks. Therefore, identifying biohazard as materials that can transmit disease captures the essence of the term accurately.