Diseases and disorders

thumb|upright=1.3|"The Sick Girl", by Michael Ancher, 1882, [[National Gallery of Denmark ]]

consists of ages nearing or surpassing the life expectancy of human beings

any factor, whether abiotic or biotic, that influences living organisms in an ecosystem

In medicine, comorbidity refers to the simultaneous presence of two or more medical conditions in a person; often co-occurring (that is, concomitant or concurrent) with a primary condition. It originates from the Latin term (meaning "sickness") prefixed with ("together") and suffixed with -ity (to indicate a state or condition). Comorbidity includes all additional ailments a person may experience alongside a primary diagnosis, which can be either physiological or psychological in nature. In the context of mental health, comorbidity may refer to the concurrent existence of mental disorders, for

disorder characterized by the progressive loss of function and/or structure of the affected tissues

medical condition or disease not transmissible directly from person to person

systemic disease is one that affects a number of organs and tissues, or affects the body as a whole

non-communicable diseases linked with the way people live their life, commonly caused by lack of physical activity, unhealthy eating, alcohol, drugs and smoking

medical condition that impairs normal functioning of bodily processes

class of non-hereditary diseases

disease or physical ailment which is in the course of worsening, growth, or spread of the disease

Multimorbidity, also known as multiple long-term conditions (MLTC), means living with two or more chronic illnesses. For example, a person could have diabetes, heart disease and depression at the same time. Multimorbidity can have a significant impact on people's health and wellbeing. It also poses a complex challenge to healthcare systems which are traditionally focused on individual diseases. Multiple long-term conditions can affect people of any age, but they are more common in older age, affecting more than half of people over 65 years old.

combining multiple genes and environmental factors

medical condition