Biohazard Symbol - Universal Warning Sign for Biological Hazards #131546 (License: Personal Use)

This universally recognized biohazard symbol features a bright yellow background with a bold black trefoil (three-lobed) design enclosed in a circle. It was developed in 1966 by Charles Baldwin and is standardized under ISO 3864-3 for high-visibility warning signage. The symbol alerts personnel to the presence of infectious agents, toxins, or other biological hazards requiring strict containment and safety protocols.

Commonly displayed on lab doors, medical waste containers, biosafety cabinets, and hazardous material packaging; used in healthcare, research, public health, and emergency response contexts to communicate risk quickly and effectively.