Behavior change, in context of public health, refers to efforts put in place to change people's personal habits and attitudes, to prevent disease. Behavior change in public health can take place at several levels and is known as social and behavior change (SBC). More and more, efforts focus on prevention of disease to save healthcare care costs. This is particularly important in low and middle income countries, where supply side health interventions have come under increased scrutiny because of the cost. Aims The 3-4-50 concept outlines that there are 3 behaviors (poor diet, little to no physical activity, and smoking), that lead to four diseases (heart disease/stroke, diabetes, cancer, pulmonary disease), that account for 50% of deaths worldwide. This is why so much emphasis in public health interventions have been on changing behaviors or intervening early on to decrease the negative impacts that come with these behaviors. With successful intervention, there is the possibility of decreasing healthcare costs by a drastic amount, as well as general costs to society (morbidity and mortality). A good public health intervention is not only defined by the results they create, but also the number of levels it hits on the socioecological model (individual, interpersonal, community and/or environment). The challenge that public health interventions face is generalizability: what may work in one community may not work in others. However, there is the development of Healthy People 2020 that has national objectives aimed to accomplish in 10 years to improve the health of all Americans. Health conditions and infections are associated with risky behaviors. Tobacco use, alcoholism, multiple sex partners, substance use, reckless driving, obesity, or unprotected sexual intercourse are some examples. Human beings have, in principle, control over their conduct. Behavior modification can contribute to the success of self-control, and health-enhancing behaviors. Risky behaviors can be eliminated including physical exercise, weight control, preventive nutrition, dental hygiene, condom use, or accident prevention. Health behavior change refers to the motivational, volitional, and action based processes of abandoning such health-compromising behaviors in favor of adopting and maintaining health-enhancing behaviors. Addiction that is associated with risky behavior may have a genetic component. Theories Behavior change programs tend to focus on a few behavioral change theories which gained ground in the 1980s. These theories share a major commonality in defining individual actions as the locus of change. Behavior change programs that are usually focused on activities that help a person