WA Health Minister Roger Cook has confirmed nine new coronavirus cases overnight, bringing the state's total of infected patients to 364.
That figure is dramatically down from the 44 new cases announced for the previous 24-hours on Sunday night.
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Of the 44 new cases on Sunday, 27 of those related to the cruise ship Artania. An additional two cases were related to cruise ships, including one from the Ruby Princess and one from Ovation of the Seas.
Mr Cook said Monday's overnight figures were 'incredibly encouraging'.
"To have single digits at any point in this is amazing, to have this at this point in the cycle of the epidemic is particularly encouraging," he said.
"But we are not out of the woods, we are sailing into this storm not out of it ... but when the storm hits, we'll be ready for it."
WA currently has 54 patients in hospitals and 12 patients in ICUs.
The minister said more than $15 million worth of clinical equipment had been ordered to bosst the public health system's response to COVID-19.
In that order was 301 ventilators, 201 humidifiers, 4000 pulse oximeters and 200 ICU beds.
"We're working day and night to reconfigure the hospital system to stand battle-ready," Mr Cook said.
"Hundreds of beds will come on tap in north and south metropolitan to make sure we essentially have a whole new hospital to draw upon."
The state's maternity services have been transferred to specialist services at Armadale Hospital and King Edward Memorial Hospital.