Some people don't want any donated blood from those that received certain injections. I understand the concern, and the supposed research only makes me more suspicious of some researchers and doctors. Too many jumped on board with sometimes incomplete testing by pharmaceutical companies, and injected (and still inject) patients even with other research pointing to dangerous, permanent contraindications with the process. With Covid, there was no reason for many to receive any inoculation, but regardless of what research showed, the results were hidden, and there were billions of dollars made on a product that had the potential to kill more people than the illness it was supposed to prevent.
There are millions of healthy older adults that probably only had DPT boosters when they were young. Not so today. Dozens of injections are given to the young, and some research shows there may be a correlation between the injections and health problems. Of course, there's a huge market for the medications, and it's advantageous in the near term to promote the product. Time, honest research, and education may show the foolishness of this process. The past is full of peddlers that have "miraculous" results from their products, and I have no doubt many of the companies selling their products are more concerned about their bottom dollar instead of the ultimate consequences of their actions.