Can't test for TB: Once a person has the BCG vaccine they can't be skin tested for TB because the test will usually appear positive. Since TB is not common in the us, it's more useful to be able to do skin testing on people who might have it than vaccinate everyone and not be able to do testing.
Answered 7/18/2020
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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