Virus - An infectious agent that is only capable of replicating itself inside the living cells of other organisms.⏎
White Blood Cell - A special type of cell that works as part of the immune system to defend the body against disease and infection.⏎
Urogenital Disease - Disease of the organs involved in the excretion of fluids and reproduction.⏎
Species - One of the most basic units of biological classification, ranking just below the genus and comprising individuals or populations capable of interbreeding.⏎