There are calls for a contingency plan to shut our borders if the world is hit by a severe pandemic.

One of the study's authors Professor Michael Baker told Mike Hosking a law and decision-making process for when a shut-down is activated needs to be implemented.

We need a contingency plan to shut the border immediately in the case of a severe pandemic, but in terms of protecting public health and the country's economy, the case is proven."

LISTEN ABOVE AS MICHAEL BAKER JOINS MIKE HOSKING