What is an Immune system?
A properly working immune system is your body’s disciplined biological defense system against foreign invading agents or antigens such as bacteria, viruses and parasites. The immune system identifies virus infected cells as well as other cells that may well be on their way to becoming tumors. Here white blood cells are our main defense against these antigens or infected cells. These specific white blood cells direct the making of specific protein called antibodies, (IgE, a special disease fighting protein) to attack the invading antigens such as bacteria or virus.
What affects our immune system?
However in other cases the immune system is either genetically weak (primary immunodeficiency) or is weakened after a prolonged or dangerous disease (acquired immunodeficiency). A case of primary immunodeficiency is the SCID or the severe combined immunodeficiency which children are born with and this makes them more prone to viruses, bacteria and fungi as compared to normal immunity. There are temporary immune deficiencies that are caused by either cancer treatment or organ transplant procedure drugs that require the body system to dampen the immunity in order to accept the drugs for recuperation. A severe case of acquired infection is of AIDS. This infection renders the immune system weak by killing off the vital white blood cells that fight against the foreign antigens.
What causes allergy?
This amazing natural clockwork mechanics of the body can sometimes be hypersensitive causing the immune system to detect harmless substances, such as pollen or pet dander, that enter nasal cavities or by other injected/ingested methods to be dangerous antigens. The varying kinds of problems these attacks pose range from mild inconvenience such as a runny nose to a total failure of the organism the immune system is supposedly protecting. Some examples of an overactive immune system are Asthma, eczema, allergic rhinitis.
In a rare scenario, our body’s immune system starts to attack our own tissues and proteins for reasons unknown. This is called the autoimmune disease. Its speculated that it’s caused by a genetic make-up by birth that gets triggered due to the surrounding environment. When this genetic disorder gets activated, the body starts to produce a kind of white blood cells called the T-cells and proteins called antibodies that start to attack normal healthy tissues. The different kinds of autoimmune disease are; type-1 diabetes, rheumatoid arthritis and Lupus. All these diseases attack the tissues of the body such as lungs, kidneys and even cells in the pancreas called insulin causing diabetes.