Astragalus has been used successfully by those who experience repeated infections, degenerative diseases, and are unable to withstand physical or emotional stress. Astragalus not only helps regulate white blood cells, but Orientals also consider it to improve resistance by protecting against damaging forces and enhancing the functions of distressed organs. Astragalus improves the function of the thymus and the spleen - the two organs primarily involved in your immune functions. Astragalus helps bone marrow and lymphatic tissue form immune cells. It has proven beneficial in treating inflammation of the kidneys and pulmonary infections, and helps protect the heart against infection and other disorders.
Selenium also appears to help stimulate antibody formation in response to vaccines.
Both are important to tissue healing.