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 When McGuire (1966a) created this theory, it was applied to social clichés. This meant it was primarily used toward the attitudes that were rarely, if ever attacked by opposing forces. The early tests of inoculation theory were used on non-controversial issues, (e.g. brushing your teeth is good for you). Few refute that brushing one's teeth is a good habit, therefore external opposing arguments against tooth brushing would not change one's opinion, but it would strengthen support for brushing one's teeth (Banas & Rains, 2010). Inoculation theory studies currently target less popular or common attitudes, such as whether one should buy