Final answer:
When administering an ID injection for a TB test or allergy testing, the MA must create a wheal.
Step-by-step explanation:
When administering an ID injection for a TB test or allergy testing, the Medical Assistant (MA) must create a wheal. A wheal is a small, raised area on the skin that occurs due to the injection of a substance underneath the skin. It is a common response to an ID injection and is used to assess an individual's immune response to a particular allergen or medication.
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