what is an allergy?

A student on a school picnic to a park on a windy day started sneezing and having difficulty in breathing on reaching the park. The teacher enquired whether the student was allergic to something. (a) What is an allergy? (b) Write the two unique charactristics of the system involved in the response observed in the student.

what is the allergy? What is the main cause behind it

What is allergy ?

What is allergy ?

What is allergy?

What is allergy? What are its symptoms?

What is allergy? What are symptoms? How it can be prevented?

What is allergy? What are the chemicals released from mast cells for allergy? Write down the symptoms of allergic reactions.

What is allergy ? Name the antibody responsible for it. Also, mention the two chemicals released from the mast cells during an allergic reaction.

What is allergy?Name the antibody responsible for it.Also mention two chemicals released from the mast cels during an allergic reaction.