Nikolas
Created page with "== Hypersensitivity reactions == Sometimes can immune system reaction injure the tissues of the body. These types of immune system reactions are called ''hypersensitivity reactions''. This occurs when the immune system is inadequately controlled, or the immune reaction might inappropriately target host tissues instead of foreign pathogens. There are many causes of hypersensitivity reactions: * Reaction against self-antigens Normally does the body ''tolerate'' (not rea..."