Western Australia has recorded three new cases of coronavirus as the McGowan Government unveils its pandemic plan to deal with the expected spread of the virus throughout the community from next month.

Key points: Three more diagnosed cases of COVID-19 brings the total to nine in WA

Three more diagnosed cases of COVID-19 brings the total to nine in WA WA has released a pandemic plan to keep delivering essential services

WA has released a pandemic plan to keep delivering essential services HBF has cancelled its Run for a Reason fun run over coronavirus fears

The latest cases were a man in his 50s, a man in his 60s and a woman in her 30s, all of whom live in Perth, WA chief health officer Andrew Robertson said.

The announcement and pandemic plan also came as Perth's Run for a Reason fun run due to be held in May was cancelled due to the risk of spreading coronavirus.

Dr Robertson said the three people had recently flown back from Europe, the United Kingdom and the United States.

Some developed symptoms on their return to Perth and others while they were on the plane.

All were separate cases and were "imported", not local person-to-person transmissions, Dr Robertson said.

He said all were in a stable condition in home quarantine.

Passengers on the three affected Perth flights who sat closest to the infected people are being contacted by health officials and told to self-isolate for 14 days.

It brings to nine the total number of diagnosed COVID-19 cases in the state, with 78-year-old James Kwan the only person in WA to die from the disease after he contracted it onboard the Diamond Princess cruise ship.

James Kwan passed away at Sir Charles Gardiner Hospital last month. ( Supplied: Australian Tourism Export Council )

"In the majority of these cases, people have actually self-isolated as soon as they have become unwell, so they've done the right thing," Dr Robertson said.

Schools, businesses, events may be closed

The pandemic plan, which was last updated in 2014, provides all Government agencies with guidelines to continue to deliver essential services in the event of a widespread coronavirus outbreak.

It includes preparations for school, business and childcare centre closures, cancellations of major events and public transport, and even processes for cemeteries to implement quicker burials.

The plan also considers "special arrangements for shopping hours to avoid overcrowding".

"I'm not a scaremonger and I'm not a panic merchant," Premier Mark McGowan told ABC Radio Perth.

"I'm just saying we just need to be prepared and that we should go about our business as normal until such time as these things are required."

The Premier said he was also considering "cost of living relief" for households and payroll tax relief for small businesses to soften the anticipated economic hit from the virus.

"The economy is very important, the best thing people can do is continue to support our local businesses," Mr McGowan said.

"We're looking at what makes the biggest difference to supporting jobs and the economy. I think the major things in that regard are payroll tax and also consumer spending."

Mr McGowan said he was also meeting mining industry representatives on Wednesday to discuss their level of preparedness for a widespread outbreak.

"Whether it's workforce concerns, whether it's relations with trading partners, whether it's any issues around the ports," he said.

The Premier is preparing travel to Canberra for Friday's Council of Australian Governments (COAG) meeting and said it was important for state and territory governments to work with the Commonwealth to ensure a nationally consistent approach to preparing for a community outbreak.

HBF cancels Run for a Reason

Event organiser HBF said it was cancelling its 2020 Run for a Reason charity fun run as a precaution against COVID-19.

More than 30,000 people were expected to take part in this year's Run for a Reason event. ( Supplied: HBF Run for a Reason )

"Our number one priority is the health and wellbeing of our members, event participants and the wider community," HBF chief executive officer John Van der Wielen said.

"We believe it is prudent not to stage large-scale community activities given the risk of spreading COVID-19."

"HBF hasn't taken this decision lightly and we share the disappointment that we know will be felt by the thousands of participants who have put so much effort into their training, the hundreds of people who generously volunteer on the day, and the WA health charities which benefit from the event."

Anyone who has registered to take part in the event will receive a full refund, the health fund said.

More than 30,000 people were expected to take part in this year's run, completing a minimum course of 4 kilometres to a maximum 21km half-marathon.

Restaurant staff temperature checks

Staff at the Perth seafood restaurants owned by Kailis Hospitality Group were today told management would begin checking their temperature before each shift.

Workers at Kailis' Fishmarket Cafe in Fremantle will be among those undergoing temperature checks. ( ABC News: Robert Koenig-Luck )

"In the coming weeks management will have to undertake temperature checks of ALL staff members prior to starting a shift," a message to staff said.

"Anyone that records an abnormal temperature will not be able to commence their shift and will be sent home until they recover."

"This is now normal practice for big hospitality groups in Sydney and Melbourne and we'll be implementing the same policy as soon as the equipment we have ordered arrives."

Kailis Hospitality Group restaurants include Kailis' Fishmarket Cafe in Fremantle, Island Market and Canteen in Trigg and The Shorehouse in Swanbourne.

Hundreds flock to COVID clinics

The release of the updated pandemic plan comes a day after Perth's first three specialist walk-in clinics began testing patients for coronavirus.

Doctors have been attending to people arriving at the Royal Perth Hospital coronavirus clinic. ( ABC News: Benjamin Gubana )

Dr Robertson said about 800 people attended for testing on Tuesday on the opening day of the clinics, at Royal Perth, Fiona Stanley and Sir Charles Gairdner hospitals.

He said about 400 of those people were tested based on risk factors regarding symptoms, overseas travel and contact with people confirmed or suspected of having coronavirus.

He said the results from the first day of testing would likely be available on Friday night.

Who should present to COVID-19 clinics? People who have EITHER a fever of 38 degrees Celsius OR acute respiratory infection

People who have Symptoms to look out for include fever, shortness of breath, cough or sore throat

Symptoms to look out for include or Patients who are tested should remain isolated at home until they receive their test results. Major clinics have been set up at Perth hospitals including Royal Perth, Sir Charles Gairdner, Fiona Stanley, Joondalup, Armadale, Rockingham and St John of God Midland. They are open from 8:00am–8:00pm daily. In Southern WA a clinic is operating at Bunbury Health Campus from 10:00am–4:00pm daily. In Northern WA a clinic is operating at Broome Hospital from 8:30am–4:00pm daily. Outside these areas, people with symptoms should present to their local hospital. For more information go to the Health Department website.

WA Health Minister Roger Cook said if demand for testing increased, more clinics would be opened, including in outer suburban areas and regional centres.

Mr Cook said eight PathWest pathology centres would now be exclusively dedicated to collecting COVID-19 specimens from patients referred by their GPs.

The eight centres are in Nedlands, Osborne Park, Mandurah, Belmont, West Leederville, Kelmscott, Jandakot and Fremantle.

Regional patients can attend one of 29 collection centres that are testing for COVID-19.

Attendees at the collection centres must have a GP referral.

The WA Government has also confirmed a $5 million upgrade of the Peel Health Campus emergency department has been delayed because of the coronavirus outbreak.

Construction work was supposed to start last week, but it has now been put off due to concerns it would temporarily halve the emergency department's waiting room capacity, preventing the isolation of patients attending with suspected COVID-19.

The upgrade has been rescheduled to begin on October 1.

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PathWest has also increased its mobile collection service, with five vehicles now available in Perth to take at-home samples from patients who have a GP referral, but feel too unwell to leave home.

Australian Nursing Federation WA secretary Mark Olson said he believed there was enough nursing staff to deal with a pandemic, but that relied on the availability of protective equipment.

"It is risky enough for our members, for other health workers, to be going to work over the coming months," he said.

"They're the ones who are going to bear the brunt of the risk. We don't want to make that risk worse by a shortage of appropriate protective equipment."