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.
Antioxidants in foods, including vitamins A, C and E, polyphenols and certain minerals, such as selenium boost immune function by quenching free radicals, highly-reactive compounds that are formed as byproducts of normal processes in the body or enter the body from the environment, according to Penn State University.