Besides healthy foods and vitamins, any other way to build immunity?

Herbs, reduce stress: Many herbs can build immunity, such as astragalus, arabinogalactin, garlic, green tea & medicinal mushrooms like maitake. Minerals like zinc help. Adequate rest & exercise help. Stress impairs immunity, so stress reduction techniques like meditation hep build immunity. Thymus extracts like proboost can help. See the road to immunity by kenneth bock md for more ideas.