Epidemics in the silver standard. Epidemics covered by the silver standard and numbers of events found by BioCaster in English and all languages. PM: Number of ProMED-mail postings, i.e. the number of true positives for each outbreak data set over the trial period of 134 days; RVF = Rift Valley Fever; FMD = Foot-and-mouth disease; HFMD = Hand, foot and mouth disease; AI = Avian Influenza. e-numbers are event series labels.