Species - One of the most basic units of biological classification, ranking just below the genus and comprising individuals or populations capable of interbreeding.⏎
Zoonoses - Any disease that can be transmitted from vertebrate animals to humans.⏎
Toxin - A poisonous substance, often a protein, produced by the metabolic processes of living cells or organisms that can cause disease if introduced into the body.⏎
Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎