Allergy and immunity are two different concepts. Allergy does not necessarily mean strong or weak immunity, but only a kind of allergic immune reaction to certain allergenic substances. Allergy is a localized or systemic symptom that occurs after exposure to pollen or other allergens, and usually improves quickly when the allergen is removed. After re-exposure to the allergen, the body will soon experience allergic reactions again, such as itchy skin, runny nose, wheezing and other symptoms. Allergic reaction is a kind of allergic immune reaction, which cannot be equated with immunity. Immunity refers to the immune response of the body’s immune system to the invasion of various types of disease-causing organisms, including specific immune response and non-specific immune response, through which the immune response to kill invading microorganisms such as viruses or bacteria. In addition, immunity can be enhanced through active immunization, such as vaccination, which can improve the ability to generate active immunity against specific disease-causing pathogens. For people with allergies, immunity, whether strong or weak, will induce the onset of metamorphic immunity when exposed to allergens, manifesting as allergic symptoms. Therefore, there is no direct relationship between allergy and strong or weak immunity.