Child immunisation rates have improved across Australia but there are still some postcodes lagging well behind.
A report released by the Australian Institute of Health and Welfare on Thursday reveals 93 per cent of Australian five year olds were fully immunised in 2015/16.
This is up from 90 per cent in 2011/12, however below the national target of 95 per cent.
There is, however, great variation between local suburbs, with rates hovering just above a very low 70 per cent.
The report examined immunisation rates across 31 Primary Health Network (PHN) areas.
For the first time, all 31 of Australia's PHN areas have immunisation rates for five year olds above 90 per cent.
Also, the gap between the areas with the highest and lowest immunisation rates has started to shrink.
However, the report shows significant variations remain across PHN areas.
The proportion of fully immunised five year olds was highest in Western NSW and Murrumbidgee (NSW) at 96 per cent.
North Coast (NSW) (90 per cent), Perth North and Perth South (91 per cent) and Gold Coast (91 per cent) had the lowest rates.
Even greater variation is seen when broken down to postcodes, says AIHW spokesman Michael Frost.
And it appears some of the nation's wealthiest postcodes are shunning the needles.
The NSW postcode 2000 - taking in the inner-Sydney suburbs of Millers Point, Dawes Point, Haymarket, Darling Harbour and The Rocks - recorded the lowest rate nationally at 70.5 per cent.
This equates to a total of 122, or about one in four, children aged five who had not received all the vaccinations listed on the National Immunisation Program Schedule.
"Even though the majority of Australian kids are immunised, it's important to maintain high immunisation rates to protect the community, including vulnerable groups such as babies who are too young to receive their vaccines," Mr Frost said.
