Immunisations
Pathogens are microbes that cause Illness affecting plants and animals.. The introduction of an inactive form of a disease into the human body that causes the immune system to produce antibodies against that disease. allow an inactive form of the disease causing pathogen to be introduced into the body, which contain a specific A protein on the surface of a substance (often a pathogen) that triggers an immune response.. This causes the The body's defence system against entry of any foreign body, including pathogens and agents such as pollen grains. The role of the immune system is to prevent disease., specifically the A type of cell found in blood that defends against infection., to produce complementary A protein produced by the immune system in humans (and other animals) that attacks foreign organisms (antigens) that get into the body., which target and attach to the antigen.