EDIT The Biohazard-sign is a warning symbol, to be placed on anything containing potentially harmful or infectuous biological waste.
 
EDIT The symbol was created in 1966 by the DOW Chemical Company employee Charles Baldwin. He used the distinctive shape of a triskele (triple spiral) in order to make the symbol instantly recognisable from all sides. Originally, the sign used to be bright orange-red. It's design was accompanied by marketing research that proved an extremely high level of recall.

Source: New York Times Magazine
 
EDIT Bandlogo Used as bandlogo by the New York hardcore band Biohazard, founded 1988. In 1994, the Rolling Stone Magazine selected it as Best Logo of The Year.
 
EDIT Tattoos Popular for tattoos due to its distinctive tribal-like appearance.
 
EDIT Computer games Logo and alternate title for the computer game series "resident evil".
 
EDIT Synonyms Biological Hazard
 
EDIT History
The development of the character, told by Charles Baldwin, New York Times Magazine, November 18, 2001.
 
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U+2623 BIOHAZARD SIGN
DEUTSCH : ENGLISH