The EBV-related tests offered at walkinlab.com do not appear to detect EBV DNA, the test of choice (as stated in the following article as well as other articles).
See: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5770746/

"we have found that elevated levels of EBV DNA in the blood are more specific for CAEBV than elevated levels of EBV antibodies. Most laboratories now perform ELISA tests for EBV antibodies, and these are often less helpful than the previously used quantitative immunofluorescent assay using endpoint dilution of serum. It is important that DNA PCR is done using either whole blood or peripheral blood mononuclear cells, rather than plasma or serum which is much less sensitive for diagnosis of CAEBV disease."