Clark, I’d urge caution just for now. I don’t want to come across as anti-vax, because I am not. However, this is a new type of vaccination mechanism (mRNA) with, so far as I know, a new lipid nanoparticle delivery system (Pfizer and Moderna vaccines). It could be the lipid nanoparticle that people are reacting to. The Oxford/Astrazenica one uses more familiar technology in that it conveys the mRNA via a modified chimp virus. For now any adverse reactions should be considered seriously.
For interest worldometer has a covid vaccination dashboard.