John Leonard
Analyst · Truist Securities.
Maybe I'll address that. Thanks for the question. The way we think about HAE in its treatment is that there's various elements that patients, doctors and payers are going to want to address. Obviously, the first is the disease itself. And based on our preclinical data and extracting somewhat from the TTR data we've accumulated so far, we're pretty confident that we'll be in a position to certainly meet and we think ultimately perhaps surpass what's been achieved for virtually any treatment modality thus far, including -- and I mean those numbers are entirely representative that you just described, but including some of the more recent data. So I think from an activity point of view, we're on the right track here. Obviously, that needs to be confirmed in ongoing clinical trials, and we're all very interested in seeing attack rates as we accumulate additional backdown data in the ongoing study. And as I said earlier, data accumulates, we'll [indiscernible] share it. But we also think that there's a couple of other elements that the devil, the treatment of these patients. Number 1 is the treatment [indiscernible], if you go and ask patients if you ask doctors, one of the troublesome elements is what it takes to get to those effects. These are otherwise pretty normal people from a disease point of view. And oftentimes, they're young, including sometimes adolescents. And so the #1 issue, once their attacks are somewhat within control, it's a treatment burden itself. And we believe that a one and done sort of potentially lifelong treatment will be a major advance for those patients. And that's certainly what the patients and the doctors tell us. But there's another element as well, which is the cost of these patients. And if you look certainly in the United States for the most effective therapies. Many of these patients have just for access to the medicine alone costs of over $1 million a year, which is an extraordinary number over the lifetime of these patients, particularly when you think of the age of onset, when they're diagnosed. And so also from an economic point of view, we believe that there's a massive opportunity to improve on the cost of these patients and to the health care system. So I think all things considered these will -- there will be attractive elements of this treatment for patients, payers, the doctors, family members, caregivers, et cetera. And we expect that it will be well received. I mean, when you think about this, and I think Salveen asked the question about the treatment paradigm, I don't think gene editing is going to be the very first intervention that doctors do. I wouldn't recommend that as a physician. But certainly, as information is accumulated. And as we understand how this drug performs, I think it's going to be a very, very attractive offering for patients in the scheme of all of the other elements that are available.