Define a biohazard.

A biohazard refers to any biological substance that poses a threat to the health of living organisms, including humans, animals, and plants. This concept encompasses a wide range of biological agents, including bacteria, viruses, fungi, and other microorganisms that can cause disease. The term also applies to materials derived from living organisms that can pose risks, such as bodily fluids, tissues, or waste containing pathogens.

In the context of mortuary science and microbiology, understanding biohazards is crucial for ensuring safety during the handling and disposal of potentially infectious materials. This is particularly relevant in practices such as embalming and other procedures that involve exposure to human remains. By recognizing biohazards, mortuary professionals can implement appropriate safety measures, such as personal protective equipment, to prevent potential transmission of harmful organisms.

This definition clearly differentiates biohazards from other hazards, such as chemical hazards or radiation. Chemicals causing explosions and radiation forms do not fit within the biological framework, and focusing solely on viral infections neglects the broad spectrum of possible biological threats. Therefore, the comprehensive nature of the second option accurately captures the essential understanding of biohazards in the context of public health and safety.