Biohazard Symbol - Universal Warning Sign for Biological Hazards #292936 (License: Personal Use)

This universally recognized biohazard symbol features a black trefoil (three-leaf) shape on a bright yellow circular background, enclosed by a bold black border. Created in 1966 by Charles Baldwin, it was engineered for high visibility and cross-cultural comprehension, regardless of language or literacy. It signals the presence of potentially infectious agents, toxins, or other biological risks requiring strict containment and protective protocols.

Used on laboratory doors, medical waste containers, biosafety cabinets, and hazard signage; serves to alert personnel and the public to biological hazards, supporting OSHA, CDC, and WHO safety standards.