Now, health officials are following up with people who have been in contact with the patients to determine their immunization status, and if necessary, offer the post-exposure protection.
The measles outbreak in Canterbury has now infected 25 people, and the Canterbury District Health Board says the number is likely to rise in the coming days.
The DHB has told medical centres in the region that extra supplies of the vaccine were being delivered, with 18,000 doses expected to be available in practices from Wednesday.
"Unimmunized people who come within two meters (6.56 ft) of an infectious person, however briefly, have a 90-percent chance of contracting measles", the Board said.More news: Xiaomi Black Shark 2 will Launch on March 18
After the detailed survey regarding the timely vaccination of children, the Health department found that nearly one-fifth of the Canterbury did not get regular vaccinations.
Measles can cause serious complications such as deafness from ear infections, or deadly pneumonia and swelling of the brain.
'As a result, there are often outbreaks occurring in this older age group and there is a risk that measles becomes established in New Zealand again, ' she said.
Interior Health confirmed in a news release a single case of measles in 100 Mile House on Saturday. Early symptoms can include a fever, a cough and a headache.More news: Sarri insists Chelsea are ready for top four battle
Several countries have had recent measles outbreaks including the Philippines, the United States and parts of Europe. The other case was an adult who had a "common exposure" to the student.
If you think you may have been exposed you could be eligible for post-exposure prophylaxis.
Symptoms include; a respiratory type of illness with dry cough, runny nose, headache, temperature over 38.5C and feeling very unwell, and a red blotchy rash that starts on day 4-5 of the illness - usually on the face and moves to the chest and arms.More news: Canada court dismisses bid by SNC-Lavalin to escape corruption trial