 How we're testing, how the samples are being collected is different. So it's really not a good comparison to look back and say, wow, look at the amount we have right now. It must mean we're in a much bigger wave than we were in a year and a half ago. I don't think we can do that with this tool at this point. So we are not at a steady state of using this tool, and so we're not at a steady state of being able to interpret it in terms of comparing.