Health officials are focused on avoiding a similar measles outbreak seen in 2019

New Zealand's current outbreak has grown to 13 infections - and more than two thousand close contacts.

One has no known links to previous infections.

A national immunisation week starts on Monday - to help bring it in under control.

Health Minister Simeon Brown says they're working hard to try stamp it out.

He says they know a large outbreak will put pressure on an already overwhelmed public health system.