A possible case of measles has been reported at a West Auckland high school.
The Auckland Regional Public Health Service is asking anyone who visited Kelston Boys' High School between 20 and 25 September to watch for symptoms.
It is working with the school to contact parents, teachers, and staff.
Measles usually begins with a high fever, runny nose, cough and sore red eyes, followed by a rash.
The Public Health Service said people infected people could start feeling symptoms between seven and 18 days afer coming into contact with it.
Medical officer of health Rob Parker said those feeling unwell should call their doctor before visiting their medical centre, as measles was highly infectious.