Biohazard Symbol - Universal Warning Sign for Biological Hazards #1951227 (License: Personal Use)

This iconic symbol, developed by Charles Baldwin in 1966, features a black trefoil on a bright yellow circle to maximize visibility and recognition. It is universally used to mark containers, equipment, and areas contaminated with infectious agents, recombinant DNA, or other biohazards. Its high-contrast design ensures immediate identification even from a distance or under poor lighting.

Used on lab doors, medical waste bins, biosafety cabinets, and hazard signage; matches user intent for safety compliance, risk awareness, or educational material about biological hazards.