Regional Public Health's asking people who may've been in contact to watch out for symptoms.
The infectious person took a 4PM Jetstar flight from Auckland to the capital last Monday.
They were also in the Auckland Airport's domestic terminal and Wellington Airport's arrival and luggage areas.
The person also visited Midnight Espresso on Cuba Street from 4PM to 9PM on Tuesday.
Members of the public who may've been in the locations at the same time - and are unsure if they're immunised - should call their doctor.
