I always travel with travel insurance which naturally covers any health issues as well as many others. Better to be safe than sorry i suppose.
Any australians travelling regularly might want to check out
http://www.1cover.com.au/
For about $300 you get 12 months cover unlimited trip coverage, international or domestic, for trips up to 90 days in length. Very good value but really only for worth it for regular travellers. Not bad when you consider one trip of 12 days can cost $90+.
No i dont work for them, its just a good deal i used myself.