Biohazard safety levels, established by the Centers for Disease Control, categorize biological agents based on their risk to laboratory personnel and the general public. These levels are essential for disease control and prevention, ensuring that microbiological and biomedical laboratories handle potentially dangerous and exotic agents responsibly. The levels include BSL-1, BSL-2, BSL-3, and BSL-4. Understanding these biological safety levels is crucial for anyone working with infectious agents, as they indicate the safety requirements needed to protect workers and the environment.