What makes some people healthy and others unhealthy?

What makes some people healthy and others unhealthy? Disease in humans is something that is impacted by many factors that can influence a persons ability to recover from a disease or even to avoid certain pathological conditions altogether. Based on both your life experience and on research about predisposing factors of disease, what makes some people healthy and others unhealthy? Are there socio-economic factors associated with risk factors? The post must be supported by facts and supported by research. It should not only include how you feel, but also acknowledge the sources you do end up using. APA format