Biohazard Symbol - Universal Warning Sign for Biological Hazards #1688817 (License: Personal Use)

This high-contrast green biohazard symbol, set against a black background, is the standardized warning sign for biological hazards including pathogens, medical waste, and contaminated substances. Created in 1966 by Charles Baldwin at Dow Chemical, its distinctive trefoil shape ensures immediate recognition regardless of language or literacy. It is mandated by OSHA and WHO for labeling in laboratories, hospitals, and waste-handling facilities worldwide.

Used on signage, containers, PPE, and digital interfaces to warn of biological risks; commonly appears in healthcare, research, biosafety training, and emergency response contexts where users seek hazard awareness or compliance guidance.