Biological Hazards
Biological hazards and threats, also known as biohazards, refer to biological substances that pose a threat to the health of living organisms, primarily that of humans.
This includes medical waste or samples of a microorganism, virus or toxin (from a biological source) that can impact human health, as well as substances harmful to animals.
The term is generally used as a warning, so that those potentially exposed to the substances will know to take precautions.