oral challenge

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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)

11 Banned Books Through Time

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Thanksgiving Turkey with all the sides

Why Do We Eat Turkey on Thanksgiving?

Thanksgiving Celebration Traditional Dinner Setting Food Concept

Why Is Thanksgiving in the U.S. Celebrated on a Thursday?

Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

Iraqi Army Soldiers from the 9th Mechanized Division learning to operate and maintain M1A1 Abrams Main Battle Tanks at Besmaya Combat Training Center, Baghdad, Iraq, 2011. Military training. Iraq war. U.S. Army

8 Deadliest Wars of the 21st Century

oral challenge

medicine

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food allergies

In food allergy
…confirm a food allergy, an oral challenge may be undertaken (with medical supervision). In this test the suspected food is eaten in increasing amounts over a period of time until a reaction occurs. An oral challenge may not be possible for those who experience anaphylactic reactions.
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