Wastes in this category are commonly found in the lab setting. However, they may also be found in research or clinical settings where animals that are known to be infected with a zoonotic agent are treated or studied.

Pathological or microbiological wastes containing potentially infectious materials are obvious examples in this category.

Note that this includes body fluids, tissues or other materials known or suspected to be infectious to humans and/or other animals, and items contaminated with these materials