Figure 3 | British Journal of Cancer

Figure 3

From: Sustained elevation of Epstein–Barr virus antibody levels preceding clinical onset of nasopharyngeal carcinoma

Figure 3

Fluctuating VCA IgA titres among non-NPC subjects during follow-up. Serum samples were taken from four non-NPC subjects (HS 1 to 4) on seven occasions at the indicated times between 1987 and 1998. Cutoff titres were set at 1 : 20 or 1 : 40 for each occasion (shaded zone). Note that antibody titre commonly fluctuated below cutoff level, whereas larger fluctuation, where antibody level rose to and beyond cutoff or declined below cutoff, was less common.

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