The biohazard sign is read as fear of contamination — something felt as toxic in a place, a habit or a relationship. Dream books treat it as an image of unease and boundaries, not as anything about the body’s health.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.