Caution - Biohazard Sign On A Brick Wall. Old Yellow Warning Sign Screwed To A Brick Wall. In The Middle Of The Panel, There Is A Biohazard Symbol And The Message Is Saying : Caution, Biohazard

KEYWORDS

accidents alertness area backgrounds bacterium biochemical biohazard biology black brick chemical color communication composition danger death design disaster disasters effect environment evil fear forbidden garbage hazardous health horizontal horror information issues label natural occupational pattern people photography plant poisonous pollution problems protection radiation rebuilding risk safety science security sign social striped symbol technology text textured threats toxic virus wall war warning waste weapon weathered yellow