Traditional medicine consider Astragalus root (tragacanth, milk vetch) as powerful natural remedy which launch immune system. It acts other way than known Echinacea. While Echinacea may help before the appearance, or at the first sign of symptoms of cold or flu appear, Astragalus helps immune system even after this already happen. Chopped Astragalus root serves for making alcohol tincture, which should be used in drops.