Andreas Kvame, CEO of Grieg Seafood, said that MSD Animal Health's vaccine against Pancreas Disease (PD) has caused major deformations and damage to its fish in Rogaland, Norway.

MSD Animal Health is rejecting the allegations.

"The seven-component vaccine caused major damage to our fish in Rogaland," Kvame said during the company's quarterly results presentation in Oslo on Wednesday.

Growth was impacted and the fish still caught PD, despite the vaccination, resulting in deformations, he said.