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. Any reappearance of smallpox is likely to be the result of bioterrorism, but the risk of this is extremely low.
For further information please see factsheet, or contact your local Public Health Unit on 1300 066 055.