A 50-year-old woman visiting from Indonesia has become the 12th person to test positive for coronavirus in Victoria.

The woman flew from Jakarta to Perth on February 27 in a healthy condition, but two days later, while staying in Perth, began to show symptoms.

The virus responsible for COVID-19, isolated from the first Australian coronavirus case. Credit:CSIRO

She arrived in Melbourne from Perth via Virgin Airlines flight VA682 on Monday, March 2 and saw a GP four days later, who ordered a COVID-19 test.

She was confirmed positive on Saturday night following a series of tests.