I looked for the covid vaccine triggering plasma cell dycrasias @leslie2121 and @kappaking and found a number of research papers on effects of covid vaccine on people that ALREADY have dyscrasias. Also, if a publication has "may" it means it is not a conclusion, more a possibility (I'm a research scientist and have also reviewed a lot of papers). Vaccines are designed to ramp up your immune system so it can be vigilant for invaders. Our personal home security system. Could autoimmune diseases be triggered by some vaccines in genetically or otherwise susceptible people? Time and research will tell so it is important to keep searching for information. Autoimmune diseases can potentially be triggered by a number of things, Reactive Arthritis by chlamydia, Lyme disease from bacteria, viruses, pregnancy, and other stressors. Here is one on the covid vaccine NOT impacting MGUS: https://ashpublications.org/blood/article/140/Supplement%201/261/487616/Sars-Cov-2-Vaccinations-Do-Not-Lead-to-Progression This "online library" paper is not research, it is more a pondering, looking at common effects on the body of covid and other diseases/conditions. Perhaps that is the link between covid and afflictions that you were referring to? There is no controlled study, just suggestions, which are fine but need actual research to see if there real links. https://onlinelibrary.wiley.com/doi/10.1002/iid3.701 . Starting with the Obama administration all Fed. govt funded research papers have to be available to the public within a year of publication; the upside of that is there is a lot of great medical and other info out there. Downsides are they are mostly written in to scientists so not as easy for the public to read, analyze, or interpret them.