Chicken soup strengthens one's immune system, has anti-inflammatory properties, relieves cold and flu symptoms such as a sore throat, and chicken soup and many of the ingredients in chicken soup help to stop neutrophil activity. Illnesses such as colds and flu, which are caused by viruses, cause the body to produce large numbers of neutrophils, which are white blood cells that phagocytose bacteria and cellular debris. Neutrophil activity stimulates the body to secrete mucus, which may be the reason for the cough and nasal congestion that occurs with upper respiratory infections.

Eggs are rich in nutrients, but it is not advisable to eat more eggs during a fever, this is because the protein within the egg is broken down in the body, it will produce a certain amount of extra heat, so that the body's heat increases, exacerbating the symptoms of fever and prolonging the duration of the fever, increasing the patient's suffering.