Though Miles thinks she gained in Vic.
Health Minister Steven Miles said the woman, in her 30s, is from Townsville and had travelled to Cairns and Brisbane before going to Victoria on October 7.
She tested positive three days after arriving in Melbourne.
Mr Miles said the woman "most likely" got the virus in Melbourne, but Queensland authorities would be "ultra cautious" and treat the case as though she was infectious while in Townsville, Cairns and Brisbane.
Given that it normally takes some days to generate enough viral load to return a positive sample and given how few people were infected in Victoria on those dates who would still be contagious in that period she must be one unlucky person to have in a very limited window (ie with a day) of time to have made contact with such a contagious person.
Also:
"She's not showing any symptoms of COVID-19 and that's why it's challenging for us to identify when she may have been infectious.
"She appears to be one of these asymptomatic cases.
So the question is why and how was she tested? Being asymptomatic there must have been a special reason. If it was because she has had contact with a known case in Melbourne, why is this not mentioned?
I suspect there is information that is known, but not revealed about this case.