Immune Function As We Age
Normal functions of the immune system include defense against infections and detection and destruction of malignant or autoreactive cells. As the immune system ages and these capabilities decline, there is increased susceptibility to infections and cancer and an increased incidence of autoimmune disorders. Your immune system helps protect your body from foreign or harmful substances. Examples are bacteria, viruses, toxins, cancer cells, and blood or tissues from another person. The immune system makes cells and antibodies that destroy these harmful substances. AGING CHANGES AND THEIR EFFECTS ON THE IMMUNE SYSTEM As you grow older, your immune system does not work as well. The following immune system changes may occur: The immune system becomes slower to respond. This increases your risk of getting sick. Flu shots or other vaccines may not work as well or protect you for as long as expected. An autoimmune disorder may develop. This is a disease in which the i