Risk factors such as a person's background; lifestyle and environment are known to increase the likelihood of certain<unk> s. They include age, gender, genetics, exposure to air pollution, and behaviors such as smoking, unhealthy diet and physical inactivity which can lead to hypertension and obesity, in turn leading to increased risk of many<unk> s. Most<unk> s are considered preventable because they are caused by modifiable risk factors. The WHO's World Health Report 2002 identified five important risk factors for<unk>  in the top ten leading risks to health. These are raised blood pressure, raised cholesterol, tobacco use, alcohol consumption, and being overweight. The other factors associated with higher risk of<unk> s include a person's economic and social conditions, also known as the social determinants of health. It has been estimated that if the primary risk factors were eliminated, 80% of the cases of heart disease, stroke and type 2 diabetes and 40% of cancers could be prevented. Interventions targeting the main risk factors could have a significant impact on reducing the burden of disease worldwide. Efforts focused on better diet and increased physical activity have been shown to control the prevalence of<unk> s .
Non-communicable disease
Disease
Infectious diseases 
Parasitic disease
Drug therapy problems
Drug pollution
Suboptimal health
Viral pathogenesis