A kura kaupapa Maori is one of five schools hit by an outbreak of measles in Hamilton - with 84 confirmed cases.
Nga Taiatea Wharekura only has one case, but medical officer of health for Waikato District Health Board Anita Bell said the student was at school during the infectious phase of the disease.
Dr Anita Bell said the student is now in isolation and others who have not been immunised are in quarantine, which can last from 10 days to two weeks.
She said it's hoped if those children in quarantine are infected with the measles, they will not be able to pass it on to others at the school.
Anita Bell said parents should check their Plunket or 'Well Child' book to see if their tamariki have received two doses of the Measles, Mumps and Rubella (MMR) vaccine.
She said if those records have not been kept, then parents should contact their GP who will be able to tell them which vaccinations their child has had.