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allergen
Table of Contents
Introduction References & Edit History Related Topics
Images & Videos
pollen grains
What does hypoallergenic really mean for consumer products?
Why do people have allergies in the spring?
Why scratching an itch actually makes it worse
Quizzes
A Yorkshire terrier dressed up as a veterinarian or doctor on a white background. (dogs)
A Visit with the Word Doctor: Medical Vocabulary Quiz
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
44 Questions from Britannica’s Most Popular Health and Medicine Quizzes
Related Questions
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Hand washing. Healthcare worker washing hands in hospital sink under running water. contagious diseases wash hands, handwashing hygiene, virus, human health
17 Questions About Health and Wellness Answered
Macro Aedes aegypti Mosquito. Close up a Mosquito sucking human blood,
Why Do Mosquito Bites Itch?
People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic
How Do Face Masks Control the Spread of Disease?
Scanning electron micrograph showing the spiral-shaped bacteria of the genus Leptospira. These organisms cause leptospirosis.
8 Zoonotic Diseases
Scan of human brain
What Are the Symptoms of a Stroke?
Discover
Shadow of a man holding large knife in his hand inside of some dark, spooky buiding
7 of History's Most Notorious Serial Killers
World Data Locator Map: Australia
Is Australia an Island?
An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.
11 Egyptian Gods and Goddesses
Law legal system crime concept with gavel and scales of justice with books in the background. (mallet, judicial system).
What Are the Differences Between First-, Second-, and Third-Degree Murder?
Abstract vector hi speed internet technology background
History of Technology Timeline
Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
The Battle of New Orleans, by E. Percy Moran, c. 1910. Andrew Jackson, War of 1812.
26 Decade-Defining Events in U.S. History

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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)
Why scratching an itch actually makes it worse
Understanding the chemical process of itching and why scratching is futile.
Video: © American Chemical Society (A Britannica Publishing Partner)

Images

pollen grains
Scanning electron microscopic image of pollen from various common plants.
Dartmouth Electron Microscope Facility, Dartmouth College
VIEW MORE in these related Britannica articles: