The legality of Aotearoa's vaccine roll out has been called into question in proceedings filed in the High Court at Wellington.
Documents put foward to court by Nga Kaitiaki Tuku Ihu Inc claim the Medicines Act was breached and seeks a declaration that the vaccination rollout is unlawful.
They also state that there is a lack of coherent research on the effects or risks of the Pfizer vaccine for use on elderly, immunocomprimised, pregnant women or people using medicines.
But Auckland University vaccines expert Dr Helen Petousis-Harris said after 100 million doses, the vaccine was hardly experimental, and the idea that it could be was nonsense.
Counsel for the applicant, Nelson-based lawyer Sue Grey, said she has done a lot of investigating on behalf of the group of "concerned citizens" and said she identified "serious legal failings" in the way the vaccine had been approved in New Zealand.