Biohazard Symbol - Universal Warning Sign for Biological Hazards #131537 (License: Personal Use)

This universally recognized symbol features a bright yellow background with a black trefoil (three-bladed) design, created by Charles Baldwin in 1963 for the CDC. It signals the presence of biological agents that pose a threat to human health, such as viruses, bacteria, fungi, or medical waste. Its high-contrast color scheme ensures visibility and immediate recognition in hazardous environments.

Used on lab doors, medical waste containers, protective equipment, and safety signage; matches user intent for hazard identification, safety training, regulatory compliance, or educational content about biosafety levels.