Vegetables and fruits are basically alkaline while meats, dairy, and processed foods are acid. Our immune system is an amazing and complex system, it fends off foreign bacteria and viruses which cause infections or illnesses. However, if an intruder is introduced, it is up to the body's immune system to eradicate it.

This is all very good advice, as your skin and mucous membranes in the mouth, nose and other areas are the first line of defense. Can Your Immune System Help Fight the Swine Flu. Instead of the Standard American Diet that consists of 80% acid and 20% alkaline food, eat a diet of 20% acid and 80% alkaline. You could go to your family doctor, but he really was trained to treat the illness. So how do you build up your immune system. You could take lots of supplements, but still may not have a healthy immune system.

If you follow the advice of the Center for Disease Control, World Health Organization, and Homeland Security, you would kevin your hands often, cover your mouth when you cough and stay at home when you are sick.