As of 2007 about 5.2% of Australian adults (765,000 people) own and use firearms for purposes such as hunting, controlling feral animals, collecting, and target shooting.

Such material is currently legal for Australian adults.

A 2005 WHO study found that just over 20% of Australian adults are obese, which is expected to rise to roughly 29% in 2010 if current trends continue.

Failure of effervescent zinc acetate lozenges to alter the course of upper respiratory tract infections in Australian adults.

Some Australian adults could learn from the teen's act.

An estimated 12% of Australian adults are seropositive for HSV-2, with higher prevalence in women (16%) than in men (8%).

A study from a large sample of Australian adults found that prolonged sitting was a risk factor for all-cause mortality, independent of physical activity.

Over 80% of Australian adults engage in gambling of some kind which is the highest rate of gambling in the world.

This program spread across Australia and by 2011 over 170,000 Australian adults had received the training (1% of the country's adult population).

Noting a landmark achievement: Mental Health First Aid training reaches 1% of Australian adults.