This is an excellent immune stimulator, and can be used as a natural antibiotic. Children respond very well to this. 2 oz. Herbs For Kids Echinacea/Astragalus Blend supports the healthy functioning of the immune system. Both Echinacea and Astragalus are well known and well documented, powerful, safe and effective immunostimulants. Echinacea supports both the bodys anti viral and antibacterial capabilities. Astragalus is the herb of choice for deep immune building during non-acute phases.