Sydney to Melbourne flight breach could have been a ‘Ruby Princess 2’, health expert says

A mistake that allowed two international travellers to bypass quarantine requirements after landing in Sydney could have ended up being a “Ruby Princess 2”, a health expert has warned.

NSW Police apologised for the mistake and said practices and systems at Sydney International Airport are being reviewed and strengthened as a result of the breach

Here’s what you need to know.

How were the two travellers able to avoid quarantine?

On Saturday, two passengers arrived in Sydney after travelling from Frankfurt, Germany via Tokyo, Japan.

The 53-year-old and her 15-year-old son were allowed to fly into Australia because they are dual German-Australian citizens.

The pair were screened by health officials and the Australian Border Force (ABF).

However…