These three types of result are typical of DetectiV, and explain why both the p value and the mean normalized log ratio must be taken into account when interpreting the results. Thus, if the results from DetectiV are filtered such that only viruses whose mean normalized log ratio is ≥ 1, and then sorted by p value, the three scenarios described here are accounted for, and we obtain the correct result in 55 out of the 56 arrays.