Actually the response to vaccines is a function of an immune system that has had thousands of years to evolve. At a time, humans were plagued by robust parasites that did real damage to the body. The adaptation process gave humans immune responses to these pesky parasites. As these immune responses were carried forward to future generations, things in the environment triggered allergic responses as if they were a parasitic attack. Things like Christmas trees, pet dander, peanut butter, your spouse’s sweat, and DemonKKKrats can trigger an allergic response as if they were parasites.
check out the “viruses are cellular parasites” sites. very interesting.