Question

what is allergy in bio​

Answer 1

◆Allergy. ... 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. These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.

Answer 2

Hey!

I hope you are doing well and here is your answer.

Allergy is the exaggerating or abnormal behave of our immune system when it comes contact with any allergens like dust,pollen grains etc.

Symptoms are sneezing,redness of nose and face, coughing etc.

I know better because I am allergic to dust.

I hope it's helpful.