Enanta Pharmaceuticals - Q4 2023

Transcript

Operator (participant)

Good afternoon, and welcome to Enanta Pharmaceuticals' Fiscal Fourth Quarter and Year-End Financial Results Conference Call. At this time, all participants are on a listen-only mode. There will be a question-and-answer session at the end of prepared remarks. Please be advised that this call is being recorded. I will now turn the conference over to you, host, Ms. Jennifer Viera, Investor Relations. Please go ahead.

Jennifer Viera (Director of Investor Relations and Corporate Communications)

Thank you, operator, and thanks to everyone for joining us this afternoon. The news release with our fiscal fourth quarter and year-end 2023 financial results was issued this afternoon and is available on our website. Making formal remarks on today's call are Dr. Jay Luly, President and Chief Executive Officer, and Paul Mellett, our Chief Financial Officer. Dr. Scott Rottinghaus, our Chief Medical Officer, and Dr. Tara Kieffer, our Senior Vice President of New Product Strategy and Development, will be available during the Q&A portion of the call.

Before we begin with our formal remarks, we want to remind you that we will be making forward-looking statements, which may include our plans and expectations with respect to our research and development pipeline and financial projections, all of which involve certain assumptions and risks beyond our control that could cause our actual developments and results to differ materially from those statements. A description of these risks is in our most recent Form 10-K and other periodic reports filed with the SEC. Enanta does not undertake any obligation to update any forward-looking statements made during the call. With that, I'd now like to turn the call over to Dr. Jay Luly, President and CEO. Jay?

Jay R. Luly (President and CEO)

Thank you, Jennifer, and good afternoon, everyone. In fiscal 2023, Enanta took important steps leading to meaningful progress in addressing the unmet need for treating serious respiratory viruses and advancing our business objectives. As we look toward the future, we continue to assess opportunities that will leverage our expertise to transform the lives of patients by discovering novel treatments for viral infections and other diseases. 2024 is shaping up to be an important year for us, with multiple inflection points expected, including potential growth into new therapeutic areas. Today, I'll provide an overview of our progress during the fourth quarter, beginning with our respiratory syncytial virus, or RSV program, and then I will comment on the rest of our pipeline and give a business update.

RSV is a severe respiratory infection associated with significant morbidity and mortality that can cause serious disease in infants, children, and other high-risk populations, including the elderly and individuals with congestive heart failure, chronic obstructive pulmonary disease, or asthma. There remains a significant unmet need for RSV treatments, despite the availability of vaccines and prophylactic monoclonal antibodies that reduce the risk of infection for some high-risk populations. Vaccines will inevitably have suboptimal uptake, and as we've seen with other respiratory viruses, even with adoption, breakthrough infections will still occur. Further, while monoclonal antibodies can provide short-term passive immunity for infants, they will only shift the infant's first infection to the next season.

We aim to fill this unmet need for an RSV treatment through the advancement of our broad RSV program, which includes EDP-938, the only N-protein inhibitor in clinical development, and EDP-323, an L-protein inhibitor, both of which have Fast Track designation from the FDA. As such, we are evaluating EDP-938 in two phase II studies, RSVPEDs and RSV-HR, as a potential treatment in high-risk patient populations. RSVPEDs is a phase II randomized, double-blind, placebo-controlled study in approximately 90 hospitalized and non-hospitalized pediatric patients with RSV, aged 28 days-36 months. It's a two-part study.

Because this is the first time the drug is being dosed in pediatrics, the objective of the first part of the study is to evaluate the safety and pharmacokinetics of EDP-938 and multiple ascending doses in order to select the optimal dose for each age group. The objective of the second part of the study is to evaluate the antiviral activity of EDP-938 at the selected optimal dose. It was designed as a small cohort to show a trend toward improved virology metrics for EDP-938 compared to placebo, and to give confidence to move forward efficiently into registrational studies. Additionally, we will evaluate symptom scores assessed through the treatment duration.

RSV-HR is a phase II-B randomized, double-blind, placebo-controlled study in adults with RSV infection who are at high risk of complications, including the elderly and individuals with congestive heart failure, chronic obstructive pulmonary disease, or asthma. Approximately 180 patients will be treated with 800 mg of EDP-938 or placebo for five days and evaluated over a 28-day period thereafter. The primary endpoint of RSV-HR is time to resolution of RSV lower respiratory tract disease symptoms, as assessed by the respiratory infection intensity and impact questionnaire, or RIIQ symptom scale. Secondary endpoints include additional clinical efficacy measures and antiviral activity compared to placebo, as well as pharmacokinetics and safety of EDP-938. In this study, we will be looking for an improvement in time to symptom resolution, our primary endpoint, as well as effects on other secondary endpoints such as antiviral activity.

Both studies continue to enroll throughout the global footprint, with RSVPEDs having over 75 sites across 15 countries and RSV-HR over 130 sites across 16 countries. Our goal continues to be completion of enrollment in at least one of these EDP-938 studies, with top-line data in the third quarter of 2024, assuming we return to a normal pre-pandemic type of RSV season in the Northern Hemisphere. We are still early in that season, but initial data are consistent with a more normal season. Also advancing our leadership in RSV, today, we announced the initiation of our phase II-A challenge study of EDP-323, an L-protein inhibitor in development as a once-daily oral treatment for RSV.

In this randomized, double-blind, placebo-controlled study, up to 114 healthy adult subjects will be infected with the RSV-A Memphis 37b virus and then randomized 1:1 to receive once daily dosing of either 600 mg of EDP-323, 200 milligrams of EDP-323, with a loading dose of 600 mg on the first day, or placebo for five days. Primary and secondary outcome measures include safety, changes in viral load measurements, and changes in baseline symptoms. We plan to report data from this study in the third quarter of 2024. The advancement of EDP-323 is supported by positive phase I results, in which EDP-323 demonstrated favorable safety, tolerability, and pharmacokinetics in healthy volunteers.

We believe either EDP-938 or EDP-323 would be effective as a monotherapy, but because the mechanism of action of each is different, we also have the opportunity to use them in combination. Pre-clinically, the combination of EDP-938 and EDP-323 has additive to synergistic activity. A combination approach would allow us to explore potentially broadening the treatment window or providing additional benefit in specific, harder-to-treat populations. In hepatitis B, we believe we need an additional mechanism to develop in combination with EDP-514, our potent core inhibitor with FDA Fast Track designation. We think a core inhibitor such as EDP-514 could ultimately be an important component of a successful combination regimen and potentially help us address the high level of unmet need in chronic HBV.

I'd like to take a moment to acknowledge that we have made important adjustments to our business this year to significantly reduce our 2024 spending and extend our cash runway through fiscal 2027, which Paul will cover in a moment. As previously disclosed, we made the decision to stop RSVTx, our phase II study in adult hematopoietic cell transplant recipients with RSV infection. We felt it prudent to concentrate our efforts and resources on our pediatric and high-risk adult studies, which comprise the largest patient populations with unmet need and represent the faster paths to market. Furthermore, we made the decision to pause our HMPV RSV dual inhibitor program. While the dual inhibitor has shown significant promise pre-clinically, we do not plan to move a third RSV compound into the clinic as long as our other two more advanced candidates continue to progress.

As we've mentioned before, we intend to conduct all future work in COVID-19 in the context of a collaboration. These changes allow us to reallocate our focus and resources to diversify our portfolio into other disease areas. We believe this path forward best aligns with our long-term goal at Enanta to deliver highly differentiated therapeutics through innovative chemistry and positions us to provide significant value to patients and our shareholders. To that end, we are excited about the expansion of our research efforts into non-virology indications that leverage our core strength in small molecule drug discovery. We look forward to providing more insight into our progress and announcing new therapeutic programs starting in early 2024. With that, I'd like to wrap up by highlighting our near-term milestones.

We look forward to reporting results from our phase II-A challenge study of EDP-323 in the third quarter of 2024. Assuming there is a return to a normal pre-pandemic type of RSV season in the Northern Hemisphere, we expect to complete enrollment in one or both of our phase II studies of EDP-938 and to have data in the third quarter of 2024. Finally, we will announce new non-virology therapeutic programs beginning in early 2024. Now I'll turn the call over to Paul to discuss our financials. Paul?

Paul J. Mellett (CFO)

Thank you, Jay. I'd like to remind everyone that Enanta reports on a September 30th fiscal year schedule. Today, we are reporting results for our fourth quarter and full year ended September 30th, 2023. For the quarter, total revenue was $18.9 million and consisted of royalty revenue earned on AbbVie's global MAVYRET net product sales. This compares to total revenue of $20.3 million for the same period in 2022. For the twelve months ended September 30, 2023, total revenue was $79.2 million, compared to $86.2 million for the same period in 2022. The decrease in the quarter in year-over-year revenue is due to a decline in AbbVie's sales of MAVYRET.

Beginning in the quarter ended September 30th, 2023, 54.5% of Enanta's ongoing royalties from AbbVie's net sales of MAVYRET, that are included in our revenue, are being paid to OMERS, one of Canada's largest defined benefit pension plans, pursuant to a royalty sale transaction in April 2023. For financial reporting purposes, the transaction was treated as debt, with the upfront purchase payment to us of $200 million recorded as a liability. Enanta will continue to record 100% of the royalties earned as revenue and will then amortize the debt liability proportionally as 54.5% of the cash royalty payments are paid to OMERS until a cap of 1.42x the purchase payment is met, after which point 100% of the cash royalty payments will be retained by Enanta.

Non-cash interest expense for the debt will be recorded in Enanta's consolidated statement of operations as a non-operating expense based on an imputed interest rate. Interest expense was $3.2 million for the three months ended September 30th, 2023, and $5.1 million for the 12 months ended September 30th, 2023. Moving now to our operating expenses. For the three months ended September 30th, 2023, research and development expenses totaled $36.2 million, compared to $34.8 million for the same period in 2022. The slight increase was due to an increase in the timing of clinical trial costs, offset by a decrease in preclinical and manufacturing costs. For the 12 months ended September 30th, 2023, research and development expenses were $163.5 million, compared to $164.5 million in 2022.

General and administrative expenses totaled $13.8 million for the three months ended September 30th, 2023, compared to $12.6 million for the three months ended September 30th, 2022. For the 12 months ended September 30th, 2023, general and administrative expenses were $52.9 million, compared to $45.5 million in 2022. The increases in both periods were primarily due to an increase in legal fees related to our patent infringement suit against Pfizer. Other income net totaled $4.7 million for the three months ended September 30th, 2023, compared to $0.7 million for the three months ended September 30th, 2022. For the 12 months ended September 30th, 2023, other income net totaled $11.4 million, compared to $1.7 million in 2022.

The increases in both periods were primarily due to an increase in investment income due to an increase in our average invested cash balance from the receipt in April 2023 of $200 million from the sale of our MAVYRET royalty, as well as increases in interest rates year-over-year. Enanta recorded an income tax benefit of $1.4 million for the three months ended September 30th, 2023, compared to an income tax expense of less than $0.1 million for the three months ended September 30th, 2022. Enanta recorded an income tax expense of $2.8 million for the twelve months ended September 30th, 2023, compared to an income tax benefit of $0.4 million for the twelve months ended September 30th, 2022.

Despite recording a financial reporting loss before taxes during the 12 months ended September 30th, 2023, we recorded tax expense driven by the receipt of the $200 million from the royalty sale agreement, which is treated as income for federal and state income tax purposes. This taxable income and its related income tax expense was substantially offset by net operating loss carryforwards, research and development tax credit carryforwards, and a deduction for foreign-derived intangible income. Net loss for the three months ended September 30th, 2023, was $28.1 million, or a loss of $1.33 per diluted common share, compared to a net loss of $26.3 million, or a loss of $1.27 per diluted common share for the corresponding period in 2022.

For the twelve months ended September 30th, 2023, net loss was $133.8 million, or a loss of $6.38 per diluted common share, compared to a net loss of $121.8 million, or a loss of $5.91 per diluted common share for the corresponding period in 2022. Enanta ended the quarter with approximately $370 million in cash and marketable securities. We expect that our current cash, cash equivalents, and short-term marketable securities, as well as our ongoing retained portion of royalties, will continue to be sufficient to meet the anticipated cash requirements of our existing business and development programs through fiscal 2027.

Regarding guidance for fiscal 2024, we expect our research and development expense to be between $100 million and $120 million, and our general and administrative expense to be between $45 million and $50 million. This is reduced from research and development expense of $163.5 million, and general and administrative expense of $52.9 million in fiscal 2023. This general and administrative expense includes an increase in legal fees associated with our patent infringement suit against Pfizer. Further financial details are included in our press release and will be available in our annual report on Form 10-K, when filed. I'd now like to turn the call back to the operator and open up the lines for questions. Operator?

Operator (participant)

Thank you. Ladies and gentlemen, if you'd like to ask a question, please press star one one on your telephone. Again, if you'd like to ask a question, please press star one one. One moment for our first question. Our first question comes from the line of Roanna Ruiz of Leerink Partners. Your line is open.

Roanna Ruiz (Senior Managing Director and Senior Biotechnology Analyst)

Hi, afternoon, everyone. So, wanted to ask about one of your RSV programs, for EDP-323, with the challenge study. I was curious, assuming that's successful, how fast could you proceed to phase III, and what sort of measures are you considering for phase III design, like symptoms or virology endpoints?

Jay R. Luly (President and CEO)

Hi, Roanna, this is Jay. So, so we're aiming, as we said on the call, to finish up the challenge study and to report out data in Q3. There's obviously some other things we would need to do in terms of preparedness for a phase. Well, beyond the challenge study, let's just say that. And I think what we're gonna do is, you know, simultaneously be watching the 938 studies and learning, you know, ultimately from hopefully at least one of those data sets in Peds or HR to help inform, you know, the development path of how we're thinking about 323 going forward. So it's a little bit premature. I wanna also take a peek at the data from the challenge study. Again, it's a very, very potent molecule.

It's got great PK. We've set up a couple of different dosing regimens, both of which are effectively QD. One's the high dose QD, and then the other is a loading dose on day one, QD, followed by a lower dose on days two through five. So we'll get the aggregate of the data, look at it, see how it compares to EDP-938 and the challenge study, at least as best we can compare two challenge studies. And then, you know, be thinking a lot about how we position either of these in the market. We think that, you know, either of them could be used as a single agent, but they also, since they have different mechanisms, could potentially be used in combination.

There's no cross resistance, and I think we would have, you know, a good barrier to resistance under the way we've chose the mechanisms in dosing them. So lots of different kinds of options, but a little bit premature to talk about 323, too far down the line.

Roanna Ruiz (Senior Managing Director and Senior Biotechnology Analyst)

Yep. Understood. My second question, I just wanted to ask about the dual inhibitor program for human metapneumovirus and RSV. I was curious, as the pause in development there, is it more just to prioritize your other more later stage RSV trials, or was there any new data that informed this decision?

Jay R. Luly (President and CEO)

No, the data, I mean, the data continued to look really interesting in terms of the profile. You know, as we think about it, again, we've got a fair number of things on our plate right now, but we've got two more advanced RSV molecules moving ahead well in development. You know, the dual, when you distill it down, yes, it hits human metapneumovirus, which we do think is an advantage. Human metapneumovirus is a fraction of the market of RSV. It's not an insignificant fraction, but it's still a fraction. I think RSV, having RSV in that dual is very important because RSV is a big piece of what that market would look like anyway.

And when we sort of sat back and looked at our current ongoing studies and the resources involved, we, you know, we have two, two that are moving along very nicely for the large piece of the overall market, which is obviously RSV. So I think we'll, you know, we still have some, you know, light activities, you know, sort of smoldering on that, but I think that the key focus is gonna be watching at our two lead horses, watching that clinical data come out, and then we've always got that molecule in our back pocket in reserve.

Roanna Ruiz (Senior Managing Director and Senior Biotechnology Analyst)

Got it. Thanks.

Jay R. Luly (President and CEO)

You're welcome.

Operator (participant)

Thank you. One moment, please. Our next question comes from the line of Jay Olson of Oppenheimer. Your line is open.

Jay Olson (Managing Director and Senior Analyst Biotechnology)

Oh, hey, thanks for taking the question and recognizing that it, it's early. Maybe just to follow up on 323, I guess, what are you hoping to see in the phase II-A challenge study? What extent of viral load reduction would be clinically meaningful? And how do you plan to differentiate 323 from 938? Thank you.

Jay R. Luly (President and CEO)

Thanks, Jay. This is Jay. I always look forward to saying that once a quarter. I think, you know, the challenge study is nice because it's been run, you know, against different classes of compounds. It's been done substantially in the same way across different classes. We've got a very strong data set with EDP-938, you know, that serves as a certain standard internally anyway, to compare data to. So the type of data that you would get from that is, you know, you look at both virology and symptoms. So you look at, and it's really compared against placebo, right? So everyone is infected on inoculation day, so to speak.

You wait for the viral loads to begin to build, and that happens variously on a different day for one person versus another. But once you start to register viral loads, the next day you begin dosing, right? And so what we found, at least with 938, was almost immediately upon dosing, you change the trajectory of the infection. So people who are dosed with placebo, viral loads continue to rise, they peak, and then they, you know, gradually decline over a period of many days. People who are dosed with our test agent, you see, viral loads basically stopped in their tracks, and in fact, are pushed downward rapidly.

So what that allows you to do is compare the area under the curve of drug treatment versus placebo, and we put very strong numbers on the boards with EDP-938. It's I think, in the 70s% reduction in the AUC. Simultaneously, you're tracking symptom scores, and you're looking at a composite of multiple different symptoms, and it's pretty much the same graph. Placebos track upward, ultimately plateau, and then have a slow decline, and drug treatment presses that curve down pretty rapidly and pretty completely. So again, it allows you to compare the AUC of drug treatment in the numerator versus AUC of placebo in the denominator. And once again, at least with 938, we put very strong numbers on the board in terms of percentage inhibition.

So that's the type of data that we'll be going for with 323. Again, we need to run the study to get the results, but it's pre-clinically a very, very strong, a very potent inhibitor. And I would say we've even got more from an exposure standpoint than everything else, even greater pressure on the virus, with 323, exposures, even over 938, which were good. So again, we'll look at the data. It may not be possible to differentiate at that stage. But you know, if it does differentiate somehow, we'll see. We certainly believe that 938 has sufficient horsepower to go the distance in most patients as a single agent. Obviously, we need to prove that with the phase II.

But to the extent we want to segment and maybe use a combo in a different patient population or relegate, you know, one of the drugs in a slightly different way than the other, again, having both of these mechanisms at our disposal will allow us to think of all kinds of things.

Jay Olson (Managing Director and Senior Analyst Biotechnology)

Great. Thank you, Jay, for the comprehensive explanation, and if I could ask just one follow-on. You have various non-virology programs at early stages, discovery stage of development. Can you just talk about what disease areas you're interested in for those non-virology programs? Thank you.

Jay R. Luly (President and CEO)

Yeah, not today. As I indicated, we'll begin to talk about that early next year.

Jay Olson (Managing Director and Senior Analyst Biotechnology)

Okay, great. Look forward to that. Thanks again for taking the questions.

Jay R. Luly (President and CEO)

Thank you.

Operator (participant)

Thank you. One moment, please. Our next question comes from the line of Ed Arce of H.C. Wainwright & Company. Your line is open.

Ed Arce (Managing Director and Senior Equity Research Analyst)

Hi, Jay and Paul. Thanks for taking our questions. Appreciate it. And congratulations on the initiation of the phase II-A challenge study for 323. I also have a question in that regard. Kind of drill down a little bit further from the previous question with regards to you know improvements measured as AUC with both virology and symptoms versus placebo. You mentioned in virology, your previous asset had or I guess 938 has shown about 70% reductions in AUC. And so what I wanted to ask is, what level you believe is both competitive and clinically meaningful? Or perhaps put another way, you know, what specific level...

or degree of reduction, defines a success, for the study sufficient to, proceed to further development? And then I have a follow-up.

Jay R. Luly (President and CEO)

Sure. Well, I, I think, no one really knows yet, and, and hopefully we'll be, you know, the first to show, is the, you know, what level you really need to drive efficacy in, in the real world infection. It's, we've looked at all the challenge study models that have been done, and, you know, EDP-938 is as basically as good as it gets in terms of driving those kinds of numbers in a challenge model. So, you know, we're hopeful that those are at least adequate numbers to do that translation in the, real world. And in terms of what we're aiming for, I mean, obviously, 938 is some sort of a standard.

I would aim to be in the ballpark of 938-like efficacy, which again, you can't translate this preclinically to clinically perfectly, but I think we use the same sort of criteria, metrics, thresholds to pass preclinically for 323 as we did for 938. So, you know, we'll see how that translates. But 938, like, efficacy in the challenge, is very strong, and I'm hoping we can do about that well with 323. It's a high bar.

Ed Arce (Managing Director and Senior Equity Research Analyst)

Right. Right. Great. And then, staying with 323, I wanted to ask also, given that you're testing two different doses, one with a loading dose on the first day and then another one, which is uniform throughout the treatment. If both of those, you know, show positive, encouraging results, what would be, you know, the rationale to continue to study both doses, especially given the differential populations that might ultimately be treated with 323?

Jay R. Luly (President and CEO)

Yeah, it's a good, good question, Ed. I think probably the short answer is we're hoping that we will define a dose from the challenge study and then move one forward. Obviously, 600 QD for 5 days, you know, has more sort of horsepower, maybe more than we need, right? And so, you know, infectious disease often will use a loading dose to, you know, to help you get to steady state quicker and then steady-state PK. And then, so what we're asking really is, can that lower dose on the tail end of the... Well, not the tail end, but after the high loading dose and the maintenance dose, lower maintenance dose, is that enough just as good horsepower? Obviously, from a cost of goods perspective, they're very different.

It's worth exploring, and we'll get an answer, and hopefully, we'll get a clear answer in terms of helping us guide future studies.

Ed Arce (Managing Director and Senior Equity Research Analyst)

Okay, great. And actually, one last one, if I may. Also, as has been asked before on the non-virology indications, I recognize that you're not prepared at this moment to discuss specifics. But just in terms of timing, early 2024, would that necessarily be around JPM? And also, given your expertise, would these new candidates necessarily be small molecule assets? Thanks so much.

Jay R. Luly (President and CEO)

Well, you're correct. Our historic skill set has been in small molecule drug discovery and development. That is still predominantly our main focus. And with regards to timing, it'll be early next year.

Ed Arce (Managing Director and Senior Equity Research Analyst)

Great. Thank you so much.

Jay R. Luly (President and CEO)

You're welcome.

Operator (participant)

Thank you. Thank you. One moment, please. Our next question comes from the line of Eric Joseph of JP Morgan. Your line is open.

Eric Joseph (Managing Director and Senior Analyst of Biotechnology Equity Research)

Hi, good evening. Thanks for taking the question. For the phase II RSV high-risk study with EDP-938, I'm not sure if it has been clarified previously, but maybe you can just remind us whether that study is open to patients who have been immunized with either of the commercial RSV vaccines. Do you expect prior immunization to comprise a meaningful proportion of that study's enrollment? And I'm just kind of maybe just looking longer term, I'm curious to get your thoughts on whether sort of how prior RSV vaccination should be treated in a phase III study design? I guess how important is kind of looking at activity on that background for the purposes of a registrational trial? Thank you.

Jay R. Luly (President and CEO)

Well, I'll answer part of the question and then hand it over to Scott Rottinghaus, our Chief Medical Officer. With regards to current state of immunization, I think less than 5% of the adult population has been immunized. And so it's not a significant factor in the current backdrop of RSV recruitment today. I'll let Scott talk about inclusion, et cetera.

Scott Rottinghaus (CMO)

Thanks, Jay. So hi, Eric, it's Scott Rottinghaus. We're not currently studying vaccinated patients in our phase II study. Obviously, we'll have to see how things are going for phase III when we design that study going forward.

Eric Joseph (Managing Director and Senior Analyst of Biotechnology Equity Research)

Okay. And maybe just to follow up on the your runway guidance into 2027, can you talk about a little bit about sort of what that anticipates in terms of additional 938 or 323 development, assuming the data in third quarter are supportive?

Jay R. Luly (President and CEO)

Yeah. So while it's advancing, you know, really both of those agents apace, you know, advancing into registration studies for each. So, yeah, no, we're just pushing them ahead.

Eric Joseph (Managing Director and Senior Analyst of Biotechnology Equity Research)

Thank you, Scott.

Jay R. Luly (President and CEO)

I think a big piece of it, you know, in terms of the reductions, you know, came from at least focusing down on, some of the, you know, current activities. Obviously, not taking a third RSV molecule into the clinic has an impact, even though, you know, as I detailed a little bit, we're maybe leaving a little bit of an hMPV opportunity on the table for now. The big driver was obviously, you know, not doing COVID, outside of a partnership. I mean, COVID was a big thing, not only with regards to, development, but also some of the other discovery activities we had, ongoing.

And then the third one was you know focusing 938 development on the two largest patient populations you know peds being number one and adult high risk being number two. It's not to say that again an agent once it's you know far along and hopefully treating you know those two patient populations it's not to say that you couldn't pick up broader label subsequently and ultimately include transplant. But just in terms of a bandwidth it's helpful and from a pocketbook perspective it's also helpful.

Operator (participant)

Thank you. One moment, please. Our next question comes from the line of Brian Skorney of Baird. Your line is open.

Luke Herrmann (Equity Research Analyst and Research Associate)

Hey, guys. Thanks for taking the questions. This is Luke on for Brian. For EDP-938, we were wondering, is it more likely that we see data from the pediatric or high-risk study first? And then do you have any specific goals in mind for the efficacy or biomarker endpoints that would give you a particular degree of confidence as you think about planning a pivotal program? Thanks.

Jay R. Luly (President and CEO)

So we can't make the call at this point in terms of which trial could come before the other. Again, they're recruiting two very different patient populations with different, you know, sort of, you know, interesting aspects regarding recruitment. So they're not similar studies from a patient population perspective at all. I think in each of the studies, you know, we're looking for virologic, especially in the ped study, we're looking for virologic trends that push us, you know, toward registration. These will be the different virologic, you know, sort of measures that we've outlined. And generally seeing something good in virology is probably, you know, very important. It's a smaller study, as we've indicated. Symptoms, getting enough symptom data is gonna be...

Well, you'll collect the symptom data you get, and then we'll try to figure out which are the most impactful symptoms and look at that sort of data. But it's a very small study to be, you know, harvesting a lot of symptom data that you can use productively. As a secondary endpoint, we'll take anything we can get there. And I think also in the high-risk patient population, we're looking at time to resolution of symptoms, and it's a symptomatic endpoint. Again, looking for a clinically meaningful readout there is what we would be aiming to do as well.

So the key is, the challenge is not to be confused with the challenge study, but the challenge is, you know, constructing these studies in such a way that they're decision-enabling to move forward to registration studies, but not sizing them to be registration studies in and of themselves. So I think that's the balance that we've tried to strike with each of these. So we're hoping for a good Northern Hemisphere season. To the extent that seasonality can be viewed as being somewhat normal, it seems to be coming around at a historically more normal time. Recall that the pandemic first, you know, moved RSV out of the equation, as well as flu.

You're starting to see headlines now about flu starting to come back, and we know that RSV is coming back, and it's We started to see it again. You know, historically, it picks up in late October and then begins its ascent there. So, you know, so far it looks like it's, the season is on track. We'll just continue to monitor and recruit away, though.

Luke Herrmann (Equity Research Analyst and Research Associate)

Great. Thank you.

Operator (participant)

Thank you. One moment, please. Our next question comes from the line of Liisa Bayko of Evercore. Your line is open.

Liisa Bayko (Managing Director and Senior Research Analyst)

Hi, I think most of my question has been answered, but, I guess, would you preclude entering into the GLP-1 space, or that, might that be an interesting area for you to contemplate developing a compound? Thanks.

Jay R. Luly (President and CEO)

Yeah. We're not really discussing our new areas, sorry, sorry, Liisa.

Liisa Bayko (Managing Director and Senior Research Analyst)

No problem. Happy Thanksgiving.

Jay R. Luly (President and CEO)

Thank you.

Operator (participant)

Thank you. One moment, please. Our next question comes from the line of Roy Buchanan of JMP. Your line is open.

Roy Buchanan (Managing Director and Senior Biotechnology Analyst)

Thanks for taking the questions. Just a couple quick ones. First, on RSVPEDs, can you just kind of break down how many patients you expect in the MAD portion versus the, I guess, dose expansion portion? And then, I think you were planning to have discussions with the FDA for EDP-235 around potential endpoints. Can you just update us on any of those discussions, any feedback from the FDA? Thanks.

Jay R. Luly (President and CEO)

Yeah. So the Peds study, it's broken into a bunch of different parts, you know, because you have, you know, dose escalation going on in multiple different little age groups, subsets, and then and then ultimately you do the dose ranging there and then move over into the other side. I think the, you know, the dose ranging part is slightly bigger than the other part, but they're roughly balanced. And then EDP-235, you know, I think it's a situation where the, you know, the world is still settling down with COVID. I think what we're seeing is, you know, well, what the world is seeing is not a lot of hospitalization and death. That is mercifully changed a little bit.

I think that's in part due to two factors. The virus has changed, and the host has changed. You know, people have variously become more immune experienced, either through natural infection or through multiple vaccinations or both. And then the virus has sort of twisted and turned into one form of Omicron or another. And now, the result of that is you see much less hospitalization and death. In fact, I think Gilead had a high-risk study running in phase three, and they recently, you know, stopped that study due to, you know, challenges in recruiting.

So I think it's fair to say, you know, summing everything up, you know, looking at the background of the patient population, as well as thinking about how you register a drug, the most expedient, straightforward path is probably in standard-risk patients. And then, you know, trying to build on that as you go and ultimately get more kinds of patients into studies. But I think focusing on high risk itself right now is a more challenging proposition.

Operator (participant)

Thank you. One moment, please. I'm showing no further questions at this time. Let's turn the call back over to Jennifer Viera for any closing remarks.

Jennifer Viera (Director of Investor Relations and Corporate Communications)

Thank you, operator, and thanks everyone for joining us today. If you have additional questions, feel free to contact us by email or calling the office. Thanks, and have a great night.

Operator (participant)

Thank you. Ladies and gentlemen, this does conclude today's conference. You may now disconnect. Have a great day.