A new report has shown that the public health system is facing increased pressure as Australians are affected by more vaccine-preventable diseases.

The latest Admitted Patient Care 2017-18 report showed 11.3 million admissions to hospital, with a 3.8 per cent growth in hospital visits.

The Australian Institute of Health said older Australians are a “key driver” of the growth, with older age groups going to hospital at a higher rate.