Question

Information about various diseases,public awareness

Answer 1

A disease is a particular abnormal condition that negatively affects the structure or function of part or all of an organism, and that is not due to any external injury.[1][2] Diseases are often construed as medical conditionsthat are associated with specific symptomsand signs.[1] 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.