HEALTH
*Health can be defined as physical, mental, and social wellbeing, and as a resource for living a full life.
*It refers not only to the absence of disease, but the ability to recover and bounce back from illness and other problems.
*Factors for good health include genetics, the environment, relationships, and education.
*A healthful diet, exercise, screening for diseases, and coping strategies can all enhance a person's health.
*The best way to maintain health is to preserve it through a healthful lifestyle.
*Epidemiology is the study and analysis of the distribution (who, when, and where) and determinants of health and disease conditions in defined populations.
DISEASE
*A disease is a particular abnormal condition that negatively affects the structure or function of part or all of an organism.
*Diseases are often construed as medical conditions that are associated with specific symptoms and signs.
* A disease may be caused by external factors such as pathogens or by internal dysfunctions.
*For example, internal dysfunctions of the immune system can produce a variety of different diseases, including various forms of immunodeficiency, hypersensitivity, allergies and autoimmune disorders.
*The study of disease is called pathology.