Australia may be dragged into New Zealand's measles outbreak after an infected Kiwi flew between the countries last month.
The New Zealander, who has been quarantined but not hospitalised with the disease, flew from Auckland to Sydney and back.
It was only on their return that they realised they had contracted the virus.
It can take sufferers up to a fortnight to experience symptoms from the highly contagious disease.
New Zealand Health authorities have made the person's flight details public so other travellers can check for their own symptoms.
The person left Auckland for Sydney on Air New Zealand flight NZ711 on at 8pm on August 23, returning on flight NZ108 at 7:50pm on August 25.
Public health officials have urged anyone on those flights - or in airport terminals around the time - to be vigilant for symptoms including a fever, runny nose, cough or sore red eyes.
The total number of Kiwis to have contracted measles this year swelled to 975 on Tuesday, with 812 from the Auckland region.
It is the most severe outbreak of the preventable disease in New Zealand this century.
Prime Minister Jacinda Ardern has implored families to ensure their children are vaccinated against the disease.
Australian Associated Press
