A strong immune system is the key to preventing any illness. In addition to eating primarily a plant based whole food diet with very limited animal products add additional nutritional supplements. such as a multivitamin and increase your vitamin C intake. Vitamin C helps your body make its own antioxidant, glutathione and assists the body in the production of interferon, an antiviral.
Vitamin C has been shown to be effective against a wide range of flu viruses. In many cases oral supplementation of about 10,000 mg daily creates this protection. In some instances it may become necessary to increase this amount.
You may also want to consider adding elderberry, licorice root and olive leaf. See our book "Look Better Live Longer" for more dietary information.