Figure 2
From: Dried blood spots as a source of anti-malarial antibodies for epidemiological studies
Blood spot quality. Fifteen μl of fresh blood were spotted onto glass fibre filter paper (top), Whatman 3 MM paper (middle) and Whatman No 1 (bottom) and scanned on both sides. For each paper, the first row of images represents the side of the paper to which blood was applied; the lower image on the extreme right hand is the obverse view of the spot immediately above. For the glass fibre paper, a four-fold magnification of one of the spots is also shown.