Photo: Supplied / Ministry of Health
The government is assuring overstayers they can get vaccinated without fear of problems over their visa status.
Authorities want the best chance at achieving "herd immunity", which means they need to vaccinate as many people as possible.
In parliament this week immigration minister Kris Faafoi said health services must record patient details, but they will not pass those on to immigration officials.
He said people without valid visas could be concerned about getting in trouble if they shared their details, but they can feel safe about getting the vaccine, and details collected during the vaccine campaign would only be used for health purposes.