Australia's Deputy Chief Medical Officer Professor Michael Kidd has told A Current Affair it's too early to tell if any cases could be detected in NSW from school holiday travellers and declined to refer to Victoria's outbreak as a "second wave" of the pandemic.
Tracy Grimshaw asked Professor Kidd on Monday night if the country should "brace ourselves over the next two weeks" to see if Victorians from lockdown areas travelled in the school holidays, potentially leading to virus outbreaks elsewhere.
"We don't know what will happen," he replied. "We don't know if there may have been any risk of transmission of people who have been holidaying in NSW from Victoria."
"We have certainly seen, over the last few days, some people who travelled from Victoria from lockdown areas into NSW and of course, now we have the lockdown coming into place tomorrow night. But again, that message, it only takes one person with the infection to spread to many other people. Please, if you have symptoms, stay at home and arrange to get tested."
Asked by Grimshaw if the 127 cases recorded on Monday meant the start of a second wave of the virus, Professor Kidd said it was a "secondary significant surge in infections."
"Whether you use the term second wave, I am not sure the term is being bandied around very widely to describe lots of things, but certainly we are seeing a second resurgence occurring in Victoria and it is very concerning."
"When we talk about the second wave, and often it is used in the context of the Spanish flu pandemic, what happened was the infection spread right across the country and resulted in even greater numbers of cases and greater numbers of fatalities than occurred in the first wave," he said.
"That is not what we are seeing at the moment in Melbourne, we're seeing an outbreak that is at the moment confined to the city of Melbourne, particularly in those lockdown areas, and we have a very rigorous response underway."