The prime minister is instead persevering with a suppression strategy, as authorities attempt to tame rising infection rates in Victoria and NSW.
Morrison says the strategy relies on the strength of state and territory health systems, and their ability to track and trace coronavirus cases, along with adherence to social distancing rules.
“You don’t just shut the country down because that is not sustainable,” he told Triple M on Wednesday.
“You would be doubling unemployment, potentially, and even worse. The cure would be worse than what arguably wouldn’t be delivered anyway.”
Morrison pointed out an ongoing Victorian outbreak, which has claimed several lives, was sparked by a quarantine breach.
“Unless we’re going to not allow any freight or any medical supplies into Australia, or not allow any exports or anything like this, there is always going to be a connection between Australia and the rest of the world,” he said.
“The right strategy is the one that we have all together been pursuing as a country, and the national cabinet has been very important to ensure everyone is moving in the same direction.”
The prime minister confirmed a NSW coronavirus cluster, which has triggered a backlash in Queensland and South Australia, came from Victoria.
He also backed Victorian Premier Daniel Andrews’ consideration of more severe lockdowns across Melbourne.
“He’s not ruling anything out, which is understandable in the circumstances,” Morrison said.
The outbreak in Victoria continues to climb, with 270 new cases recorded on Tuesday.
Another two people died in the state, bringing the national toll to 110.
Health authorities are concerned that more than a quarter of people who have been hospitalised with the virus are in intensive care, with 21 in Victoria needing ventilators.
In NSW, there are now 28 cases linked to a pub in southwest Sydney, prompting the restrictions on gatherings at licensed venues to be tightened again.
Anyone who attended the Crossroads Hotels in Casula between July 3 and 10 must get tested for coronavirus and self-isolate for 14 days even if the result is negative.
Queensland has added the NSW cities of Campbelltown and Liverpool to its list of coronavirus hotspots, meaning anyone from there must spend 14 days in hotel quarantine if they want to enter the northern state.
Federal Health Minister Greg Hunt has warned there will be more deaths from coronavirus.
“I think if we are honest, there will be more lives lost. There will be more people admitted to ICU and more on ventilation,” he told the Nine Network.
Hunt told the ABC that Australia would have to cut itself off from the outside world if it hoped to eliminate the coronavirus.
“That would mean obviously no gatherings, no protests, no trade, no returnees from overseas, no family reunions.”
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