Te Whatu Ora wants New Zealanders to get fully immunised against measles before they travel overseas.
The health agency says 15 people travelling to New Zealand two weeks ago were exposed to a measles case in Australia.
Fourteen were immune and one has been quarantined.
The warning comes amid growing case numbers around the world.
National Public Health Service interim clinical lead Dr William Rainger spoke to Ingrid Hipkiss.
