The paper Dr Bhakdi refers to can be found here: On COVID vaccines: why they cannot work, and irrefutable evidence of their causative role in deaths after vaccination. From the paper:
Conclusion
Histopathologic analysis show clear evidence of vaccine-induced autoimmune-like pathology in multiple organs. That myriad adverse events deriving from such auto-attack processes must be expected to very frequently occur in all individuals, particularly following booster injections, is self-evident.
Beyond any doubt, injection of gene-based COVID-19 vaccines places lives under threat of illness and death. We note that both mRNA and vector-based vaccines are represented among these cases, as are all four major manufacturers.