The job of the immune system is to seek out, recognize, and destroy pathogens disease causing substances or organisms, such as bacteria and viruses. In fighting off these trespassers, your body produces symptoms of illness as fever and malaise . When a pathogen enters the bloodstream, a type of immune cell called macrophage absorbs it, then calls up two other types of immune cells B cells and T cells .
B cells produce antibodies to fight the invader directly.
T cells help in various other ways. The immune system then remembers the chemical signature of that particular pathogen and can respond much more rapidly with antibodies should the same pathogen ever attempts another invasion. Nothing makes as much difference to your health as a well-functioning immune system. It can save you from all manner of problems, from minor infections to cancer. Foods are a major factor that affect your immune system.