Biohazard Symbol - Universal Warning Sign for Biological Hazards #3796678 (License: Personal Use)

This iconic black-and-white symbol, developed by Charles Baldwin in 1966, consists of three interlocking arcs surrounding a central circle, forming a trefoil shape. It is standardized under ISO 3864-3 and used globally to mark containers, labs, equipment, and areas contaminated with biological hazards such as viruses, bacteria, or medical waste. Its high-contrast design ensures visibility and immediate recognition, even under low-light or stressful conditions.

Used in healthcare facilities, research labs, waste disposal sites, and emergency response contexts; matches user intent for hazard identification, safety training, regulatory compliance, or educational content about biosafety.