Maybe it was coincidence. I’m just saying if the vaccine gave people Lyme, here’s my hypothesis. But it makes a lot of sense that an autoimmune disease created by exposure to X could be triggered by a vaccine containing X. The definition of a vaccine is to expose a person to whatever it is the immune system recognizes — spike proteins and so on. It’s plausible. But as you point out, not very likely.
>By 2001, with over 1·4 million Lyme vaccine doses distributed in the United States the VAERS database included 905 reports of mild self-limited reactions and 59 reports of arthritis associated with vaccination [29]. The arthritis incidence in the patients receiving Lyme vaccine occurred at the same rate as the background in unvaccinated individuals. In addition, the data did not show a temporal spike in arthritis diagnoses after the second and third vaccine dose expected for an immune-mediated phenomenon. The FDA found no suggestion that the Lyme vaccine caused harm to its recipients.
54,000,000 Americans have had some form of arthritis [1]. I don’t exactly find it compelling that 0.0001% of them also happened to have gotten a vaccine.