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allergy
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allergy
What does hypoallergenic really mean for consumer products?
anaphylaxis skin test
Why do people have allergies in the spring?
Learn about hygiene hypothesis and know-how the immune system recognize and neutralize foreign bacteria from harming the body
Learn about the hygiene hypothesis and understand how exposure to certain germs help develop a child's immunity
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allergy
allergy summary
Quizzes
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Videos

What does hypoallergenic really mean for consumer products?
Debunking the claims of hypoallergenic products.
Video: © American Chemical Society (A Britannica Publishing Partner)
Why do people have allergies in the spring?
Learn what allergies are and what causes them.
Video: © American Chemical Society (A Britannica Publishing Partner)
Learn about hygiene hypothesis and know-how the immune system recognize and neutralize foreign bacteria from harming the body
The hygiene hypothesis, proposed in the late 1980s by American immunologist David...
Video: © MinuteEarth (A Britannica Publishing Partner)
Learn about the hygiene hypothesis and understand how exposure to certain germs help develop a child's immunity
Research suggests that exposure to germs early in life helps a child develop a healthy...
Video: Science in Seconds (www.scienceinseconds.com) (A Britannica Publishing Partner)

Images

allergy
An allergic contact dermatitis reaction caused by exposure to poison ivy.
© Joy Brown/Shutterstock.com
anaphylaxis
Systemic anaphylactic response to bee venom in an individual with type I hypersensitivity....
Encyclopædia Britannica, Inc.
skin test
Positive allergic reactions to a skin test on a patient's back.
© Andy Lidstone/Shutterstock.com
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