Revealed: Mystery infection struck down passengers on flight to Auckland

The passengers caught in a mid-air health scare on a flight to Auckland have escaped relatively unscathed.

Emergency services were sent to Auckland Airport on Monday after 100 people were reported ill on the trans-Tasman flight from Melbourne.

Passengers on the Virgin Australia VA167 flight told Newshub the pilot alerted authorities because of his concerns over some passengers' wellbeing as many were coughing.

Six ambulances were sent to the airport and paramedics checked all passengers onboard before letting them off the plane.

Auckland District Health Board medical officer of health Dr Shanika Perera says multiple people were treated after suffering what's believed to be a respiratory infection.

"There are many causes of respiratory symptoms and it is possible that some of the passengers had a respiratory infection," Dr Perera told Newshub.

Respiratory infections can include flu and colds, along with more serious infections like bronchitis and pneumonia.

"After the assessment of all passengers on the flight, ten people were found to be unwell, but not seriously," Dr Perera adds.

"None of these patients required further medical treatment or public health follow-up."

All the travellers who fell ill have been cleared by health officials and have left Auckland Airport.

A list of symptoms has been handed to travellers, in case they feel unwell.