Following from a news article about a couple who were touring NZ, and have had their tourist visa extended several times are essentially applying to stay in NZ on humanitarian grounds and become asylum seekers until they are given the Vaccine in New Zealand as they in the 'at risk' category due to their older age.

Stuff article

Ironically they're from the US who've already started vaccinating thousands of their public and don't want to risk travelling there unless they're vaccinated already. 

This is a very hairy question as it opens up a great many cans of worms. 

Keen for a discussion!