Thanks, Matthew. Let me try and give you a sense of how I see the data. First of all, my sense from the emerging data is that attack rates of our trial participants do mirror what we see in those zip codes where the subjects are coming from. It's not a surprise because if you look at the demographics of what we've been able to achieve in the COVE study, having so many people, minorities older with co-morbid conditions, so it's on par with expectations, I think writ large. And unfortunately with the current attack rates not slowing down, the math that we're doing, it's this paradox of more attack rates out there worse off for our subjects unfortunately, but the data will get there. So that's my sense. Now there is a balance to be had, which I think is -- I've tried to address in the first question that not just us but everybody in the field is struggling with, which is the accumulation of data versus the eventual unblinding of participants and how does that all play into regulatory expectations, and I think we'll continue to have this dialog in the coming weeks. The concern you raised about functional unblinding, yes, I share that. I think we all do, to a certain degree. We chose a dose that we believe is optimal in the sense that people may get some transient flu-like symptoms, but it's worth it for the opportunity to prevent this disease. I don't think this leads to lower event rates, per se. I think my biggest concern is that, if anything, it would bias us against vaccine efficacy rate. If people behave because they think they got something and that modifies their behavior, then if anything, you would expect that the behaviors would be such that the placebo recipients would be less at risk of getting infected and the vaccine recipients would be more at risk of getting infected. So at least from a statistical and robustness of the data, it shouldn't have any adverse effect. If anything, it should hurt us. But I don't expect this ultimately to be significantly changing the event rates. And if I look at the macro picture, as I've said, I think we're going to be on track, unfortunately, for where we anticipate being.