Profile of a woman sneezing. Does she have a cold or an allergy? The spray of germs can be seen.
An allergy is an abnormal reaction or increased sensitivity to certain substances. The allergic individual produces symptoms when exposed to these substances which are harmless to non allergic people. The main reason for this is that allergic people make a special type of antibody called immunoglobulin e ige which can react with environmental substances in a harmful way. These substances are called allergens.
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Location: Chicago IL USA
Photo credit: © Custom Medical Stock Photo / Alamy / Afripics
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