Hi
I have a weak immune
system as well and what works for me is Echinacea, Glodenseal, kelp,
Enteric coated garlic caps . Astragalus, Codonopsis, burdock root, nettles. Astragalus and the Garlic enteric tabs together really help me feel much better. I also drink 1 quart every other day of Hyssop tea with plenty of water .Hope this helps some.