Descriptive statistics of the virus neutralisation test for 10 randomly selected samples per serotype. Box-and-whisker diagram of the calculated titres for each serotype. Showing the smallest observation, lower quartile (Q1), median, upper quartile (Q3), and largest observation. In addition outliers according their interquartile range (IQR) and means are displayed. The top and bottom diamond vertices are the respective upper and lower 95% confidence limits (CI) about the group mean. Each circle represents the calculated titre of a sample.