Measles is back in New Zealand and travellers coming into the country are urged to make sure they have been immunised against the disease.
Every case of the highly contagious virus originated from people travelling into the country from overseas since 2012, the Ministry of Health said.
Nevertheless, a fourth case of measles has been confirmed in Canterbury around the same time one case has been confirmed in Auckland.
Auckland Regional Public Health Service said the person attended Clendon Medical Centre on February 19, 20 and 21.
The person appears to then have been moved on by the medical centre on February 21 because they were assessed at Middlemore Hospital around 5pm.
Medical officer of health Dr Jay Harrower said all patients at the medical centre or Middlemore around the same time might have been exposed.