Two more cases of COVID-19 came back with positive tests today.

A Territory couple who disembarked from the Ruby Princess cruise ship in Sydney and flew to Darwin tested positive to COVID-19 today.

This brings the number of confirmed cases of coronavirus COVID-19 in the NT to five in total.

The ship had docked in Sydney on Thursday after sailing from New Zealand.

The infections only became public 24 hours after the ship docked.and although some passengers displaying flu-like symptoms while aboard, four COVID-19 detections were not known until well after passengers disembarked.

There were 2647 passengers on board the Ruby Princess - deemed "low risk" by the NSW government and now scattered all across Australiam, including Darwin.

Two people in Darwin yesterday tested positive to COVID-19.

Authorities said both people followed the recommended health protocols to minimise the risk to others until they could get medical treatment.

More reading: Pandemic clinic opens in Katherine.

A man in his 30s tested positive for the virus after he travelled to Darwin from Zagreb via Istanbul and Denpasar, arriving on Flight JQ82 at 5am on March 19.

He immediately went into self-isolation and was later tested at the Royal Darwin Hospital Pandemic Clinic. He is now in isolation in Royal Darwin Hospital.

Separately, a 21-year old woman has tested positive after returning to Darwin from Utah, she travelled from Utah to San Francisco and on to Brisbane, before arriving into Darwin on Flight QF824 on Thursday.

She went into self-isolation immediately and was later tested at the Royal Darwin Hospital Pandemic Clinic after developing a sore throat and a cough. She is now in isolation in Royal Darwin Hospital.

People on those flights are being contacted as part of the contact tracing procedures.

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