A customer is looking at the IgE intensity variation. Is there any possibility of interference from, for example, IgG?

A customer is looking at the IgE intensity variation. Is there any possibility of interference from, for example, IgG?
a) If a patient is having SIT treatment, thus having elevated IgG levels in the blood – it is possible that IgG might cause some interference. b) The intensity variation could also be sample dependent due to sample stickiness. It has been noted that this results in higher CVs than for other samples if tested repeatedly.
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As in all diagnostic testing, the diagnosis is made by the physican based on both test results and the patient history.