Detection rate, positive predictive value and F1 score for A/H5N1 human cases and epizootic detected by systems from 1st to 31st March 2010.

Auto: Automatically emailed; Prov: Provided by system. (a) Virtual combined system pooling the 6 systems i.e. event detected by any of the system was considered as detected by the combined system, (d) differs from (b) + (d) because it includes events that could not be categorized in human cases or epizootics.