"How. . .foolhardy is it then, when vaccinal microzymas are not only from another species, but are already morbidly evolved and are accompanied by preservatives, formaldehyde, and other chemicals? There is no sanity whatever to this practice. The best that can be said about it is that it may prevent, against the odds, the appearance of varying sets of symptoms. But this is at the price of weakening the immune system, toxifying the body, and possibly setting the stage for degenerative symptoms later in life—all the while doing absolutely nothing for, except perhaps worsening, the underlying disease condition."

https://www.westonaprice.org/health-topics/notes-from-yesteryear/germ-theory-versus-terrain-the-wrong-side-won-the-day/