A. Technical details of IC method to visualize L1 Abs. IC values are given as a visual score, determined by the color chart. (C, control line; T, test line). B and C. Scatter plots of IC (x-axis) and MB-ELISA (y-axis) from the same samples for anti-HPV-16 and HPV-18 Ab levels. B. The same samples in Fig 2 were measured by IC. C. The same samples in Fig 3 were measured by IC. Five samples were arbitrarily selected from each group. Appearance of IC results were shown in S3 Fig.