In movies and TV you see heroin users insert a needle, pull blood out, and then inject. 1. Is that how people really do it, and 2 why do they mix blood first? 1.07K viewsJanuary 3, 2024 Question90.62K February 17, 2020 0 Comments In movies and TV you see heroin users insert a needle, pull blood out, and then inject. 1. Is that how people really do it, and 2 why do they mix blood first? In: Biology 10 Answers ActiveNewestOldest Anonymous Posted February 17, 2020 0 Comments [removed] You are viewing 1 out of 10 answers, click here to view all answers. Register or Login
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