| http://www.w3.org/ns/prov#value | - So it is possible for people to have a positive reaction to a skin test but have a negative reaction to a blood test.Are not affected by antihistamines or tricyclic antidepressants, so people do not need to stop taking these medicines while being tested.May be a good choice if you have very sensitive skin or a skin problem, such as eczema, that would make it hard to see whether you have a reaction
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