Interesting stuff, amigo. As I recall from the 70s & early 80s, vaccinations were OK, so long as the vaccines were not developed thru the use of some animal's blood. For example, a vaccine developed thru eggs was OK, but one formulated thru monkey blood was not.
Having said that, I've never had a flu shot. Mrs. O shakes her head at me every winter & dutifully goes to the doctor for hers. But oddly, I almost never get sick.
Go figure.
I'll probably keel over from a heart attack or lung cancer in about 10 years. Or maybe my liver will finally tell me it's had its fill.