FMDV infection prevalence at aggregate level. The farm-level (herd-level) prevalence reflects the number of farms with FMDV infection positive found animals and the animal-level prevalence reflect the number of FMDV infection positive found animals within the sampled population. Both prevalence values are shown with the exact binomial confidence interval. Furthermore, the moving average (SMA) for both measures is displayed and the date of Eid ul-Azza is indicated. In the lower panel temperature and precipitation measured in Karachi in the period of April 2006 to April 2007 is displayed.