anaphylaxis

Anaphylaxis is the most serious, easily fatal allergy not only seen in young children but also adults if not diagnosed and dealt with promptly.

Post-vaccination reactions are usually systemic symptoms associated with skin manifestations such as erythema, Quincke edema, urticaria or respiratory tract, including rhinitis -

A type of female hormone called estrogen (including three estradiol, estron, estradiol) may cause women to experience more serious allergies than men.