Fifteen staff members at the Mater Hospital in Brisbane have been quarantined due to potential coronavirus exposure.

The staff members work in the hospital’s emergency department.

In the video above: Man who flew back from Iran diagnosed with coronavirus

They will be under self-quarantine for 14 days.

“This measure was taken as a precaution in line with Queensland Health recommendations,” the hospital said in a statement on Thursday.

“The safety of our patients and staff members is our highest priority and Mater is complying with all Queensland Health requests.

“Whilst the actual risk is low, this is a precautionary measure.”

A foreign visitor with children in face masks at a Beijing subway station during an outbreak of the 2019-nCoV coronavirus. Credit: Roman Balandin / Roman Balandin/TASS

It comes as Queensland confirmed its 12th and 13th coronavirus cases on Thursday.

An 81-year-old man and a 29-year-old woman have been diagnosed after returning to Brisbane from Thailand and London, via Singapore, respectively.

The man, from the Sunshine Coast, is in a stable condition in hospital.

File image of a ‘biohazard’ sign at a health facility. Credit: Peter Kovalev / Getty Images

The woman has been described by Queensland Health as “well” but is isolated in Brisbane.

Contact tracing efforts are now underway.

It brings the number of people in Queensland diagnosed with the deadly disease this week to five.

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A 20-year-old Brisbane male student, 26-year-old Logan man and 63-year-old Gold Coast woman are in isolation in hospital.

The 20-year-old man’s housemate has tested negative.

Eight other people who contracted coronavirus have recovered and been discharged from hospital.