Biohazard Symbol - Universal Warning Sign for Biological Hazards #131659 (License: Personal Use)

The biohazard symbol consists of three interlocking crescent shapes radiating from a central circle, designed in 1966 by Charles Baldwin for maximum visibility and intuitive recognition. Its stark white-on-red contrast ensures high legibility even under poor lighting or from a distance, making it essential for labeling pathogens, medical waste, and contaminated equipment. The symbol is standardized by ISO 3864-3 and OSHA for use in laboratories, hospitals, and emergency response settings.

Used on signage, containers, protective gear, and digital interfaces to indicate biological hazards; supports user intent for safety compliance, hazard identification, or educational content about biosafety levels.