A  disease  is a particular abnormal condition that adversely affects the structure or  function  of all or part of an organism and is not immediately due to any external  injury . [ 1 ] Diseases are often known to be  medical conditions  that are associated with specific  signs and symptoms . 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 .  A person might know they get unwell from some things that happen in life. Negative thoughts are said to cause disease and positive thoughts health to the body. Vitality of the body comes from heart felt activity fun times exercise and good food smart listening to the body’s needs. To get good company to get ...