A Northland man who went to a Tool concert attended by a confirmed coronavirus patient is now sick.

The Far North man and his partner are now in self-isolation and awaiting test results to see if they have the potentially-fatal Covid-19.

The 28-year-old Northland man went to the Tool concert in Auckland's Spark Arena on February 28, and was standing in the same area as New Zealand's fourth coronavirus case.

DUNCAN BARNES US band Tool performed in Auckland in February, with fans including a coronavirus case (photo from Perth concert).

Last Friday, Ministry of Health director-general of health Dr Ashley Bloomfield said anyone standing in the area were classed as casual contacts and were at very low risk of catching the virus but should be aware of coronavirus' symptoms.

READ MORE:

* Coronavirus: Man who tested positive went to Tool concert

* Coronavirus: Tool fans' risk depends on Auckland man's symptoms, expert says

* What we know about the five New Zealand coronavirus patients

Despite the low risk, strict infectious disease protocols were used when the man and his 22-year-old female partner started developing symptoms.

The pair asked not to be named until the test results were in, so as to not unduly alarm anyone.

The woman said she rang the Healthline 0800 number and waited for over an hour to speak to someone.

"Then it all went so fast when I started talking about our symptoms," she said.

MONIQUE FORD / STUFF The Ministry of Health's Director-General of Health Dr Ashley Bloomfield delivering an update to the media on the response to COVID-19 coronavirus

"Within an hour of talking to them we were on our way to the hospital with strict instructions to stay in the car and call the hospital when we arrived."

The couple were given masks and escorted to the emergency department in an isolated room where they were seen by health officers with masks, glasses, gloves and yellow disposable aprons, she said.

The couple are now at home in Kaikohe awaiting the test results, which are expected on Thursday.

DAVID WHITE/STUFF International tourists wearing face masks as a precaution against the fast-spreading coronavirus.

"Until then, we are self isolating, which is a little frustrating but I understand it is for the best for Aotearoa."

The couple's symptoms include a cough, sore throat, nausea, diarrhoea, body aches, fatigue, headaches and fevers.

The woman hopes the couple do not have the virus and are just battling a flu.

A spokeswoman for Spark Arena said no concert attendees had contacted the venue regarding the virus.

WHAT YOU NEED TO KNOW

Covid-19 is a respiratory disease caused by a recently discovered coronavirus. It spreads via droplets from the nose or mouth expelled when a person with the disease coughs, sneezes or exhales.

The most common symptoms are fever, tiredness and dry cough. Some people become infected but don't develop symptoms or become unwell.

About four in five people recover without needing special treatment. About one in six become seriously ill and develop difficulty breathing. About one in 50 die.

The risk of catching Covid-19 from someone with no symptoms is very low, because the virus spreads via droplets expelled by coughing. However, it is possible to catch the disease from someone with very mild symptoms, including a cough.

To minimise the spread of infection, wash your hands thoroughly with an alcohol-based rub or soap and water, cover your mouth and nose when coughing and sneezing, and keep at least a metre away from other people coughing and sneezing.

People who display symptoms should phone Healthline on 0800 358 5453 in the first instance - don't head straight to your doctor or medical centre.