Well, I don't practice voodoo and never will as it is evil. Some of us may have been rather stupid in our understanding of "voodoo", however. Which would be more effective, sticking pins in a doll or hypodermic needles into an actual person? Or are they part and parcel of the same evil?
Vaccination is medical witchcraft, imo. Injecting a (formerly) health person with a toxic brew in order to render them chronically ill, easily controllable or dead.