]] is standard procedure.]] A biological hazard or biohazard is an organism, or substance derived from an organism, that poses a threat to (primarily) human health. This can include medical waste, samples of a microorganism, virus or toxin (from a biological source) that can impact human health. It can also include substances harmful to animals. The term and its associated symbol is generally used as a warning, so that those potentially exposed to the substances will know to take precautions. There is also a biohazard HCS/WHMIS logo which utilizes the same symbol. In Unicode, the biohazard sign is U+2623 (?). Biohazardous agents are classified for transportation by UN number: · UN 2814 (Infectious Substance, Affecting Humans) · UN 2900 (Infectious Substance, Affecting Animals) · UN 3733 (Diagnostic Specimen or Clinical Spec

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