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 existed for all hypotheses. The results of their experimentation yielded the understanding that inoculation coupled with reactance-enhanced messages leads to "stronger resistance effects" (p. 148). Consistent with the medical analogy of inoculation theory, Miller, et al. (2013) liken reactance-enhanced messages to a "booster shot," increasing the success of the inoculation. Another unique feature of the study is examining low-controlling language versus high-controlling language and its impact on affect and source credibility. Similarly, Miller, et al. (2007) utilizes psychological reactance theory (Brehm, 1966, 1972; Brehm & Brehm, 1981) to avoid or eliminate source derogation and message rejection. In this study, their