allergy overview
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Date
2018
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Journal Title
Journal ISSN
Volume Title
Publisher
جامعة الشيخ عبدالله البدري
Abstract
An allergy is a reaction by your immune system to something that does not bother most other
people. People who have allergies often are sensitive to more than one thing. Substances that
often cause reactions are
Pollen
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Normally, your immune system fights germs. It is your body's defense system. In most allergic
reactions, however, it is responding to a false alarm. Genes and the environment probably both
play a role.
Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes,
swelling, or asthma. Allergies can range from minor to severe