Biohazard Symbol - Universal Warning Sign for Biological Hazards #3091278 (License: Personal Use)

This iconic symbol, developed in 1966 by Charles Baldwin at Dow Chemical, features three interlocking circles surrounding a central circle, forming a trefoil shape. It is universally used to mark containers, equipment, and areas containing biological agents that pose a threat to human health, such as viruses, bacteria, or medical waste. Its high-contrast black-on-white design ensures immediate recognition and compliance with safety standards worldwide.

Used on laboratory signage, medical waste containers, PPE packaging, and biosafety documentation; matches user intent for safety training, regulatory compliance, or hazard identification resources.