Use a bulb of garlic (or half if you can't take the whole shebang), some onion, maybe a spice or two and a little salt. Use spices that are known for their anti-inflammatory action, maybe a little anti-bacterial action as well. Being a vegetarian, I never go near chicken, but use combinations of garlic, onion, cayenne, ginger, that type of thing. You can experiment a bit and add chicken to the broth when it seems about right. On a side note, I would limit the amount of ginger or cayenne and load up on the garlic/onion for taste.