An Australian nurse remains under Ebola observation in a UK hospital.

The nurse – whose name hasn’t been released for privacy reasons – was transferred to the UK from Sierra Leone on Saturday following a “low-risk clinical incident” at the Australian-managed Ebola Treatment Centre (ETC), Foreign Minister Julie Bishop has said.

A medical assessment in the UK determined the risk of the nurse developing the deadly disease remained low.

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Ms Bishop said the nurse would undergo “a highly precautionary” 21-day observation.

To date, 29 patients have recovered from Ebola and been discharged from the centre, she said in a statement.

In mid-January an Australian nurse treating Ebola in Sierra Leone was airlifted to the UK after personal protection protocols were accidentally breached at the centre run by Aspen Medical.

It was a low-risk incident and the evacuation was a precautionary measure.

The World Health Organisation on Friday approved a quick test for Ebola aimed at dramatically cutting the time it takes to determine – with reasonable accuracy – whether someone is infected with the deadly virus.