Manage your booking. Conveniently modify your flight booking and select your travel preferences. Everything you need for smoother travel, now at your fingertips.
Immune response. A response from the body to an antigen that occurs when the antigen is identified as foreign and that induces the production of antibodies and lymphocytes capable of destroying the antigen or making it harmless.
An allergic reaction is the body's way of responding to an invader.. When the body senses a foreign substance, called an antigen, the immune system is triggered. The immune system normally protects the body from harmful agents such as bacteria and toxins. Its overreaction to a harmless substance (an allergen) is called a hypersensitivity reaction, or an allergic reaction.