But where does it happen? They could show that the nucleus of infected cells contains proteins from the virus. The mechanism how this happens and the importer molecules involved are known. Viruses do that to disable the self defence of infected cells. I would be concerned if we would have hints that the virus can infect immune system cells without replicating, so the cells survive and maybe replicate with modified DNA. I would be concerned if we would have hints that the vax mRNA or vax induced spike proteins can somehow enter the nucleus (maybe with the help of a virus) and these cells then somehow get not killed by the immune system. All jab side effects can be explained by antibodies so far (for example, platelet activation triggered by antibodies). Most side effects get really strong after the second jab, when the immune system has learned to create antibodies fast and in huge numbers. It seems that the antibody quality control does not work very well in a simulated infection. I'm reluctant to accept more complicated theories as long as the simple ones hold water.