Laine Bradley was only 10 months old when she came down with measles -- too young to have received the vaccine.

Her mother, Cecily Johnson, had taken her on a trip from their home in Western Australia to Sydney.

The last significant surge occurred in 2019, with 284 cases reported throughout the year.

Measles was considered to have been eradicated in Australia in 2014, when The World Health Organisation (WHO) declared Australia free of the disease.

In Australia, doses of the measles vaccine are given at 12 months and 18 months.

However, since the pandemic that number has been steadily declining.

"In terms of overall herd immunity, the impacts at this stage may be relatively small. But measles immunity gaps are much greater in some parts of Australia, such as the north coast of New South Wales and the Gold Coast in Queensland," the pair wrote.