Sensitivity analysis for two lengths: BTV RNA detection in blood and persistence of colostral antibodies. Impact on estimates of vertical transmission (mean value and CI 95%) of the length of BTV RNA detection in blood (A), and of the length of persistence of colostral antibodies (B); Impact on estimates of monthly probabilities of vector-borne infection (and CI 95%) of length of BTV RNA detection in blood (C) and of length of persistence of colostral antibodies (D). The estimates of vertical transmission and probabilities of vector-borne infection were obtained with the same model (one-area), but with variations in both lengths considered. The base-line values used for these lengths in all other analyses are the ones in bold (*). The other values are those investigated as part of the sensitivity analysis. *, Base value used in all other analyses in the present study.