Now, because we do not have a global reach as a company, we will concentrate our commercialization efforts in the U.S. So going forward, you can expect us to increasingly have a higher proportion of our portfolio retained for U.S. rights and licensed for ex-U.S. purposes. So that’s going to be the path forward for us, and in our discussions with companies, generally everybody wants to have the U.S. component, but it’s also clear, Mayank, as you know, that the ex-U.S. cancer market is growing, led by China, but also other geographies. So hence, ex-U.S. market in terms of the value that it will generate for our collaborator/partners of the future will become much more significant.
In terms of QS-21, so as I have said, I mean, this is, again, another complex subject. People have asked me the question, for example, GSK made one of their adjuvant systems available upwards of about a billion doses for COVID vaccines. And the question that was asked was, does it contain QS-21? And if not, why not? So the answer to that question is, it does not contain QS-21, and the reason is very simple. You cannot make enough QS-21 today to supply a billion doses or anywhere near it. You can’t even make 100 million of doses of QS-21. So what does that do?
That means that we’re obligated, with a high sense of responsibility, to make sure that we explore renewable sources of raw material for making QS-21 saponin — and it’s very important that you realize QS-21 saponin has been in well over 1 — I’m sorry, 10 million people. There is no QS-21 from any other source that I know that has that many people treated or vaccinated with it. Now, that’s why, for example, how QS-21 saponin has proprietary components in terms of manufacturing which are known to us and known to GSK and no one else. No one else has rights to that proprietary manufacturing process.
Now, along with that proprietary manufacturing process, we are actively working on upscaling from an engineering perspective a renewable raw material that Jen talked about, okay? It’s a plant cell line that will be the feedstock for making QS-21. That’s what we’re working on. Now, we’ve gone through the scientific validation of that process, so we know that, for example, QS-21 saponin that we make from that process is exactly the same profile as the traditional QS-21 saponin that we’ve made from the natural tree bark. So that’s been done. The next step is simply engineering, scaling up. And of course, science is behind us, engineering is ahead of us, and people say, well, so why can’t you scale up tomorrow? It’s not that simple, because plant cells take time to grow. And so scale-up takes a little bit of effort as well. But bear with us. From our sense of responsibility, we will do this. We will upscale and we will scale up.
Now, importantly, should some of the vaccines out there — there’s something like five lead COVID-19 vaccines that have been advertised, and of those five, four that we know don’t have an adjuvant in their formulation. So if those four, or even the fifth one, don’t perform exactly as we all hope they will perform, if that happens, and one needs to boost its activity — for example, in Shingrix, you have 90%-plus efficacy. In a similar vaccine for shingles, you have 50% efficacy. One of the key differences between the two is the 90%-plus efficacy contains QS-21 saponin; the other one doesn’t. So should those COVID vaccines need help in the future because they don’t perform as we all hoped they will, then we would like to make sure that for this pandemic or for future pandemics, we will be ready. That’s the purpose of what we’re doing. Does that answer your question, Mayank?