"There's been cases of measles in other parts of New Zealand including South Canterbury, Auckland, Northland and Bay of Plenty as well," Medical Officer of Health Dr Craig Thornley said.
Regional Public Health was following its usual process to try to determine those who might have been exposed to the patient, he said.
"The most important way to prevent measles is to have the measles, mumps, rubella, or the MMR, vaccine given on time."