The Hazard Characteristic Code (HCC) designation for Infectious Substance. Hazard Group & Comments: A viable micro-organism or its toxin, which causes or may cause animal or human disease as published in Title 42 CFR, Section 72.3. Includes Infectious Substances Affecting Animals only (UN 2900), Infectious Substances Affecting Humans (UN 2814), and Etiologic Agent, N.O.S. (NA 2814)