Excellent work, as always. I'd like to find a way to calculate the protection your work provides against the malfeasance of the Covidians. I think it would be higher than VE against COVID.

I have a question, however. The Delta CFR is, of course, a critical premise of your argument. Do you have a sense of how accurate that number is? I assume it's not based on 100% sequencing of samples, but on some selection criteria for samples to sequence and model assumptions for calculating the overall Delta CFR. Is that correct? Do you think it's reliable?