Question

What do u understand by allergic reaction​

Answer 1

Answer:

When a person who is allergic to a particular allergen comes into contact with it, an allergic reaction occurs: When the allergen (such as pollen) enters the body, it triggers an antibody response. The antibodies attach themselves to mast cells.

Answer 2

Answer:

Allergic Reactions

Allergies often bring to mind sneezing, a runny nose or watery eyes. While these are symptoms of some types of allergic disease, it's important to understand that an allergic reaction is actually a result of a chain reaction that begins in your genes and is expressed by your immune system.

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