@thor
> it seems likely to me that all the vaccines could have this side effect, since they all cause antibodies to be produced, and it's the antibodies that cause the problem, not the delivery mechanism for the vaccine.
i have heard the theory that nasal/oral vaccines are better wrt. side effects because they mimic the "natural" way pathogens get into the body vs. the "THEY ARE HERE!111" way of vaccines applied by injection. it seems that mucous membranes are a specialized part of the immune system.
https://en.wikipedia.org/wiki/Mucosa-associated_lymphoid_tissue