A<unk>  <unk>  is a<unk>  that is not transmissible directly from one person to another.<unk> s include Parkinson's<unk> , autoimmune<unk> s, strokes, most heart<unk> s, most cancers, diabetes, chronic kidney<unk> , osteoarthritis, osteoporosis, Alzheimer's<unk> , cataracts, and others.<unk> s may be chronic or acute. Most are<unk> -infectious, although there are some<unk><unk>  infectious<unk> s, such as parasitic<unk> s in which the parasite's life cycle does not include direct host-to-host transmission.<unk> s are the leading cause of death globally. In 2012, they caused 68% of all deaths (38 million) up from 60% in 2000. About half were under age 70 and half were women. Risk factors such as a person's background, lifestyle and environment increase the likelihood of certain<unk> s. Every year, at least 5 million people die because of tobacco use and about 2.8 million die from being overweight. High cholesterol accounts for roughly 2.6 million deaths and 7.5 million die because of high blood pressure.
Non-communicable disease
Disease
Infectious diseases 
Parasitic disease
Drug therapy problems
Drug pollution
Suboptimal health
Viral pathogenesis