Schattentarn
A True Doomsday Prepper
Sorry for the technical nature of the report. These researchers documented the progression of lymphoma, a cancer, after the patient reported a reaction to the vaccination. Even though this is only one person, it might be considered a cautionary tale.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8656165/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8656165/