A RAST test (short for radioallergosorbent test) is a blood test used to determine to what substances a person is allergic. This is different from a skin allergy test, which determines allergy by the reaction of a person's skin to different substances.
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Some articles on rast test:
... The RAST test is scored on a scale from 0 to 6 RAST rating IgE level (KU/L) comment 0 < 0.35 ABSENT OR UNDETECTABLE ALLERGEN SPECIFIC IgE 1 0.35 - 0.69 ...
... There are three common types of allergy testing skin prick test, blood test, and food challenges ... An allergist can perform these tests, and they can also go into further depth depending on the results ... For skin prick tests, a tiny board with protruding needles is used ...
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