SANDRINGHAM DRY CLEANERS:

* June 19 - A Victorian man attends a party at his daughter's home in West Hoxton, Sydney. The party is later declared a super-spreader event, with 24 of the 30 attendees and many of their household contacts testing positive for COVID-19.

* June 20 - Man returns to Melbourne by plane.

* June 21-23 - Works three shifts at Sandringham Dry Cleaners.

* June 24 - Man tests positive for COVID-19. The owner of the dry cleaning business also tests positive.

VIRGIN FLIGHT:

* June 25 - A Sydney-based Virgin Australia cabin crew member works on multiple services while potentially infectious, stays overnight in Melbourne.

* June 26 - Crew member leaves Melbourne for Sydney, tests positive for COVID-19.

HUME FAMILY INCURSION:

* July 4 - Three family members who live in the local government area of Hume return from Sydney by plane on red zone permits, which require them to isolate at home for 14 days.

* July 6 - All three family members return negative test results.

* July 8 - A fourth family member returns home by car.

* July 10-11 - Two members of the family develop COVID-19 symptoms, get tested.

* July 12 - The duo return positive results.

* July 13 - Third family member also tests positive.

REMOVALISTS:

* July 8 - Three removalists travel from NSW to Victoria on workers' permits. They deliver furniture to a family home in Craigieburn and do a pick-up at a Maribyrnong apartment. Both families of four are isolating. The removalists say they slept in their truck overnight.

* July 9 - The removalists leave Victoria and enter SA, where one is contacted by NSW Health and is told they are a primary close contact of a confirmed case. They return to NSW.

* July 11 - One of the men tests positive for COVID-19, Victorian authorities alerted.

* July 12 - Second removalist tests positive. Residents of the Maribyrnong apartment block they visited required to self-isolate for 14 days.

Australian Associated Press