More than three quarters of a million booster doses have been put in New Zealanders' arms so far

From today, people over the age of 18 are able to book online to have their booster shot four months since their last vaccine dose.

The paediatric Pfizer jab rollout has also begun today.

Children aged five to 11 across the country can now get the jab at walk-ins, drive throughs, Hauora providers, community pharmacies and general practices.

More than 120 thousand doses of the child vaccine have been delivered to about 500 vaccination sites around New Zealand.