Medical Officer of Health Dr Cathy Pikholz said immunisation was the only way to prevent the disease.
"Measles is one of the most contagious vaccine preventable diseases. It moves fast. One person with the measles can infect many others.''
New Zealanders who are not immunised, have only had one measles immunisation, and were born after 1968 are most likely to be susceptible to measles. Before 1969 almost everyone contracted measles as a child.
Anyone who notices measles symptoms should contact their GP or Healthline on 0800 611 116 - it is important to phone ahead to avoid spreading measles in waiting rooms or emergency departments.
Measles immunisation is available from any GP or family doctor.
Earlier this month authorities began tracking 226 passengers on the same flight as a baby with measles. Parents of the sick 7-month-old sought medical attention after arriving at Auckland International Airport on a Singapore Airlines flight.
Shortly before that case, 10 cases of measles were confirmed in Auckland, Turangi and Taupo after New Zealanders returned from the 2013 World Supremacy Battleground hip-hop competition in Sydney where an infected person performed.