Biohazard ☣
Copy & Meaning

A biohazard symbol — the three-circle interlocking design that marks biological materials posing infectious risk to living organisms. The biohazard symbol was specifically designed in 1966 to be memorable, distinctive, and meaningless without specific training — ensuring it would be taken seriously rather than ignored as an abstract decoration. Medical waste, infectious disease research, and biosafety level (BSL) rated laboratories all use this marking.

The COVID-19 pandemic elevated public awareness of biological hazard concepts. Used for medical and laboratory safety discussions, pandemic and disease content, horror and zombie fiction aesthetics, infectious disease research, and any context involving the category of threats that come from biological organisms rather than chemical or radiological hazards.