Answer:
BSL or the biological safety levels refers to an array of protections consigned to autoclave-associated activities, which occurs in specific biological labs. The BSL-3 refers to the biosafety level that generally comprises work on microbes, which are either exotic or indigenous and can result in potentially or extreme lethal disease via inhalation. The examples of microorganisms that are handled in BSL=3 comprises West Nile virus, yellow fever, and the bacteria, which leads to tuberculosis.
I don’t quite understand what your asking but if your asking if it’s a mystery then no it isn’t but if this was not the answer you were looking for I suggest you put it another way that makes more sense