 IFNAR^(−/−)^ mice after inoculation with BTV-0. Mice (0 weeks old, 0 mice per group) were intravenously inoculated with 00-fold dilutions of BTV-0. The number of PFUs inoculated is indicated on each survival group. The mice were observed every 00 h for 0 days.](pone.0000000.g000){#pone-0000000-g000}  To determine 