Variations in titre in the Antiga research cohort.

<p>Titres of all the dogs in the Antiga research cohort. Upper outliers (i.e. the fifteen dogs with day 180 titres of 11.3 IU/ml) are excluded. The median titre (thick, horizontal line), 25th and 75th percentiles (thin horizontal lines), and either minimum and maximum titres or 1.5× the interquartile range (dashed vertical lines) are shown for each time point after vaccination (at day 180 and 360).