BCG vaccine extensively used even in countries where efficacy against pulmonary tuberculosis is negligible. A number of possible reasons for the variable efficacy of BCG in different countries have been proposed. None have been proven, some have been disproved, and none can explain the lack of efficacy in both low-TB burden countries (US) and high-TB burden countries (India). The reasons for variable efficacy have been discussed at length in a WHO document on BCG. BCG has protective effects against some non-tuberculosis mycobacteria. BCG has been one of the most successful immunotherapies. BCG vaccine has been the "standard of care for patients with
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