Figure 1
From: Enzyme-linked immunoassay for dengue virus IgM and IgG antibodies in serum and filter paper blood
Comparison of dengue ELISA in serum and reconstituted filter paper blood. Serum and blood spots on filter papers were collected simultaneously from the same patient and tested at the same time with the same ELISA. The reference lines indicate the cut off value for the index value (< 1: negative; ≥ 1: positive). The sloped lines indicate the regression of y to x (_____) and x to y (-----).