Question

व्हाट डू यू मीन बाय एलर्जी एंड​

Answer 1

Answer:

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.[12] These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.[2] Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling.[1] Food intolerances and food poisoning are separate conditions.[4][5]