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.
For more foods that may help boost your immune system, try adding garlic, foods high in probiotics (such as yogurt and kefir), and green tea to your diet. Chew BP, Park JS. Carotenoid action on the immune response. J Nutr. 2004 Jan;134(1):257S-261S.