I am looking for a way to improve my resistance to colds and viruses. Unfortunately I am taking the drug Orencia, which lowers the immune system by impacting on T-cells, so I cannot use immune system builders like Astragalus, Elderberry etc. Is there anything else out there (in the past I have had infusions of Vit C and Meyer's cocktail to fight illness) that might help me ward off the effects of these frequent colds and viruses?View Thread