Excellent analysis as always. Something I don't quite understand about the "vaccinated superspread hypothesis,” is why would it drive up CFR? It certainly would increase the total case count, and it would in theory promote hotter variants, but delta isn't that. Is the idea that higher viral loads in the vaccinated is resulting not only in higher contagion, but also in more symptomatic disease for the people they spread to? Is there precedent for that?