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Loading So far six people have died with COVID-19 in Australia and 568 have tested positive for SARS-CoV-2. NSW Health authorities are expecting 20 per cent of the population could contract the virus in the first wave - 5 per cent would need intensive care and 1 per cent would die. But Professor McVernon refused to disclose what the advisors' current modelling indicated when it came to projected mortality and morbidity rates for coronavirus in Australia. "I will not give you a number to tell you where this is going or how bad it's going to be, because we have also just implemented a suite of interventions and we will continue to monitor how that is going," she told the National Press Club on Wednesday, hours after Prime Minister Scott Morrison announced unprecedented restrictions on overseas travel and restricting mass gatherings. "We converged early on the expectation that this was the worst case we were preparing for, for say an influenza pandemic, and as time has emerged that's become clear," Professor McVernon said. “We always knew, we knew on the 3rd of February, that there [would] come a point when it would be inevitable that our capacity could not completely put out every spark. "Now we are moving to the 'flattening the curve' phase", Professor McVernon said. Professor McVernon and her Australian colleagues are parts of a global network of modellers who share information “rapidly, openly and freely … so that in these times of vast uncertainty we can together arrive at a clear understanding of the threat our world is facing”. Loading Replay Replay video Play video Play video The Australian modellers join their counterparts around the world at least once a week for a meeting convened by the World Health Organisation. Loading In early February, "based on what we could see of the virus we all had a pretty good idea that it was spreading very rapidly", she said. Most of their early disease intelligence came from media reports and web scraping, an unprecedented function of our interconnected and media-saturated times. Professor McVernon said it had become clear that asymptomatic people, or people who had not yet developed symptoms, could spread the virus. Quarantining was vital in concert with social distancing measures to "help those of us who do not know we might be spreading an infection to prevent making others unwell", she said. "This is what we model in flattening the curve. It's not magical," she said. "How long that will take, we don't know. We're saying at least six months, if we do this well, it will take at least six months to keep that curve flat enough to be within our capacity." "We would like to do better than that if we could, but that will be longer. Singapore is telling its people, it will take 12 months. But what we all firmly believe is that a strategy that says we should try to keep the virus out and suppress it all together until there's