White Blood Cell - A special type of cell that works as part of the immune system to defend the body against disease and infection.⏎
Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎
Virus - An infectious agent that is only capable of replicating itself inside the living cells of other organisms.⏎
Zoonoses - Any disease that can be transmitted from vertebrate animals to humans.⏎
Species - One of the most basic units of biological classification, ranking just below the genus and comprising individuals or populations capable of interbreeding.⏎