The BD Veritor product insert claims an LOD of 1.4 x 10 2 TCID50/mL. Though a source is not referenced for the irradiated virus, we assume it is BEI NR-52287, lot 70033322 as the stock titer for this lot of BEI irradiated virus matches the stock titer in the certificate of analysis for this lot. The ratio of copies per mL per TCID50 per mL for this lot is 6071 which corresponds to an LOD of 8.5 x 10 5 copies per mL. However, the LOD method utilized in the Veritor product insert utilizes serial dilutions which are added onto a swab, and then further diluted into the Veritor sample transfer buffer. Without this additional dilution step the reported BD Veritor LOD would likely improve.