Those who eat a healthy and balanced diet, support their body in all processes of everyday life, strengthens the immune system and is then often more resistant, when the defenses are particularly demanding - such as a cold or allergy. There are also foods that inhibit the allergy-causing histamine in the body with hay fever and so can relieve the symptoms.
https://www.businessinsider.com.au/how-to-vent-in-your-job-search-2012-3