Money supply. In economics, the money supply (or money stock) is the total amount of monetary assets available in an economy at a specific time. There are several ways to define money, but standard measures usually include currency in circulation and demand deposits (depositors' easily accessed assets on the books of financial institutions).
Smallpox (Variola). Smallpox last appeared in Australia in 1938, and the last case naturally occurring cases in the world was reported from Somalia in 1977. The virus is now only held officially in two secure laboratories.
Rabbits in plague proportions. Rabbits, like most other pest species, were introduced when Europeans first settled in Australia. Rabbits were introduced from two main sources; the domesticated rabbit which provided early settlers with a ready source of meat, and the wild rabbit introduced later for hunting.