CD79A and nasopharyngeal carcinoma: This is further discussed under the paragraph “proteomics.” Epstein-Barr virus DNA load [95% (95% confidence interval, 91–98%)] and IgA-VCA [sensitivity of 81% (95% CI, 73–87%)] are two of the most sensitive biomarkers found in the peripheral blood of nasopharyngeal carcinoma patients.