The batch dependencies in the mRNA shots, why are some deadlier than others?

Together with Vibeke Manniche (physician) and Max Smeling (statistician), Willem Engel discusses their landmark publication about batch dependent adverse effect reports. Based on the batch data of Denmark the authors have proven that there are in fact 3 different injection fluids who have a very different safety profile. Whether this is caused by the design of the product of changes in the production proces is not clear yet. What is clear based on the Swedish data that this is a European problem, yet the institutions are looking the other way.