Medical experimentation, vaccines, drugs, changing how doctors were taught to heal instead of how they treat now, by Pharmaceuticals. The doctors used to treat the whole body and not just parts, rarely did you need a specialist. They used to write their own formulas for medicine and much of it was vitamins and minerals, like iron tablets etc.
We now have a lot of mistakes by doctors which cause massive deaths. They think they are taught correctly, nope, they are not taught correctly.