The Director-General of Health insists New Zealand's not slowing its Covid-19 vaccine roll-out.

The Ministry of Health's warned District Health Boards to tightly manage their supplies - over the next five weeks.

Walk-in appointments will be paused and jabs for prisoners and some Defence Force workers will be slowed.

But Ashley Bloomfield told Heather du Plessis-Allan they'll deliver more jabs in the next five weeks - than in any week to date.

"We're still ramping up, but what we're going to do is just make sure each DHB can deliver 100 percent of their plan and honour the bookings."

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