BCG vaccine 400 per 100,000 in that higher risk context). The age of the person and the frequency with which BCG is given has always varied from country to country. BCG is prepared from a strain of the attenuated (virulence-reduced) live bovine tuberculosis bacillus, "Mycobacterium bovis", that has lost its ability to cause disease in humans. Because the living bacilli evolve to make the best use of available nutrients, they become less well-adapted to human blood and can no longer induce disease when introduced into a human host. Still, they are similar enough to their wild ancestors to provide some degree of
Inoculation theory motivation to maintain current attitudes and beliefs, but weak enough that the receiver will refute the counterargument (Compton, 2013; McGuire, 1964). Inoculation has been proven successful through trials and research. This article highlights vital aspects of inoculation theory, however, it is not exhaustive–there is a large volume of quality research on the theory not mentioned. Finally, while numerous studies have tested and verified the efficacy of the inoculation process, there continues to be a need for refinement and elaboration. Inoculation theory is used today as part of the suite of tools used by those engaged in shaping or manipulating public