Biohazard Symbol - Universal Warning Sign for Biological Hazards #1239897 (License: Personal Use)

This universally recognized biohazard symbol features a bright yellow circle with a black trefoil (three-lobed) shape, designed to alert individuals to the presence of potentially infectious or toxic biological materials. Created in 1966 by Charles Baldwin, it is standardized by ISO 3864 and OSHA for use in laboratories, healthcare settings, and waste disposal operations. Its high-contrast color scheme ensures visibility and immediate recognition, even under stress or low-light conditions.

Used on containers, doors, signage, and protective equipment in medical, research, and industrial environments where biological hazards exist; matches user intent for safety compliance, hazard identification, or educational content about biosafety protocols.