The way social factors affect health.

There are direct factors and indirect factors in the way that social factors affect health. The direct factors are lifestyle and customs. Indirect effects mainly play a role through the central link of psychological feelings. Portal effect, intermediary effect, modulator Section II Socio-economic factors and health. For example, GDP, GNP, GDP per capita, GNP per capita, health expenditure per capita, birth rate, mortality rate, average life expectancy, infant mortality rate and so on.