Co-ordinators say Auckland's largest previous vaccination clinics handled about 1000 bookings a day.
Patients are being bussed to the events centre from the Manukau Institute of Technology.
More than 16,000 people have booked into the mass vaccination event and the event is fully booked so no walk-ins are allowed.
Yesterday some people reported an hour-long wait before they were able to get their vaccination, with long queues to register and then to get on the shuttle buses.