A. Early symptoms of the illness are much like the flu. After a short time (in some cases a day or two), more severe pneumonia-like symptoms may appear. Not all individuals with Legionnaires' disease experience the same symptoms. Some may have only flu-like symptoms, but to others the disease can be fatal.
The bone broth in chicken soup contains collagen, which can help boost your immune system, in addition to amino acids and nutrients that help prevent inflammation. Chicken soup's illness-fighting ability is thought to be related to cysteine, an amino acid released from chicken during cooking.
One study shows a chemical in broccoli helped boost the immune systems of mice. Plus, it's full of nutrients that protect your body from damage. It has vitamins A and C, and glutathione. Add some low-fat cheese to round out a side dish with immune-enhancing B vitamins and vitamin D.