What symbol indicates the presence of hazardous biological materials?

The biohazard symbol is specifically designed to communicate the presence of hazardous biological materials that may pose a risk to humans, animals, or the environment. This symbol features a distinctive triangular shape and is usually displayed in orange or yellow, making it easily recognizable.

The use of the biohazard symbol is crucial in laboratories, healthcare settings, and areas where biological materials are handled, as it alerts individuals to take the necessary precautions when interacting with potentially infectious agents or harmful biological substances. It serves as an immediate visual cue to ensure safety and compliance with health regulations, highlighting the importance of appropriate protective measures when working with these materials.

In contrast, other symbols such as the warning symbol, caution symbol, and danger symbol are used more generally for various hazards but do not specifically denote biological threats.