CD79A and infection: The corresponding median anti-YghJ IgA levels in saliva were 697 (IQR: 373, 1377) nAUs before infection and 1432 (IQR: 502, 2594) nAUs on Day 10 (Fig. 1b), and the median fold change was 1.86 (IQR: 1.13, 3.71; p = 0.006) (Fig. 2) for the 20 volunteers included in these analyses.