English: Graphical illustration of low sensitivity and high specificity. Each data point is represented by a circle. Data which failed the test are drawn on the left side of the vertical bar and data which passed the test are drawn on the right side of the vertical bar. False negatives are shown as closed blue circles in the left panel and false positives are shown as closed red circles in the right panel. All other data points (open circles) are either true negatives (on the left) or true positives (on the right).