Auckland concert

Tool fans 'may have been exposed to coronavirus' at show

A man in his 30s, who attended the gig in Auckland's Spark Arena, has been confirmed as the nation's fourth case of the virus.

"He was in the general admission standing area in the front left-hand quadrant," said health officials.

They added the risk of catching the virus was "low" but advised audience members to be aware of the symptoms.

The man, who had recently arrived back in the country from northern Italy, has been isolated at home since Wednesday. His partner was announced as New Zealand's second case earlier this week.

Sir Elton's emotional Instagram post after being escorted off Auckland stage

"I was diagnosed with walking pneumonia earlier today [Sunday], but I was determined to give you the best show humanly possible," he said in an Instagram post after the concert. "I played and sang my heart out until my voice could sing no more."

Walking pneumonia is an infection caused by bacteria that mostly affects people's respiratory tracts. It's less severe than other forms of pneumonia but can still leave people feeling sick.

Despite efforts to battle through his set, he was forced to cut the show short.