Positive Health

Maslow proposed a hierarchy of needs in which more primitive desires must be met (basic physiological, sense of safety) before social needs can be met (e.g. intimacy), and certainly before one can effectively pursue more conceptual needs (e.g. morality).

There is evidence suggesting that negative emotions can be damaging. In an article titled "The undoing effect of positive emotions", Barbara Fredrickson et al. hypothesize that positive emotions undo the cardiovascular effects of negative emotions. When people experience stress, they show increased heart rate, higher blood sugar, immune suppression, and other adaptations optimized for immediate action. If individuals do not regulate these changes once the stress is past, they can lead to illness, coronary heart disease, and heightened mortality.
Both lab research and survey research indicate that positive emotions help people who were previously under stress relax back to their physiological baseline. Other research shows that improved mood is one of the various benefits of physical exercise.

Belgium:
Belgium's largest health insurer is currently undertaking a large-scale campaign called "Pluk Je Geluk" based on positive psychology research with the goal of increasing the population's general well-being. See http://www.plukjegeluk.be/detail/geluk-en-wetenschap for more information.

Hungary:
Prof. Mária Kopp: Epidemiology and Positive Health in the Hungarian society (http://behsci.hu/drmaria-kopp/curriculum-vitae)
Prof. Attila Oláh: Psychological Immune Competence and Flow (http://www.ppk.elte.hu/oktatok-dolgozok/m-o/olah-attila/)