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 an individual. Future studies in the area of health can be extremely beneficial to communities. Some areas that are currently being researched can possibly help with present-day issues (e.g., inoculation-based strategies for addiction intervention to assist sober individuals from relapsing). Other areas for future studies include, promoting healthy eating habits, exercising, breastfeeding and creating positive attitude towards mammograms (Ivanov, 2017). An area that has been underdeveloped is mental health awareness. With the number of young adults and teens committing suicide due to bullying this can be an area where inoculation messages could be effective. McGuire (1961) used a medical analogy