Stephen Hoge
Analyst · Goldman Sachs
Thank you, Paul. Good morning and good afternoon, everyone. On slide 16, I’d like to briefly summarize our COVID-19 booster development strategy for the endemic phase. So, as Paul covered, the strategic rationale for a seasonal booster has three parts. First, we think neutralizing titers will wane, similar to the endemic human coronaviruses, as Paul just described. That decline in neutralizing titers will increase the risk of breakthrough hospitalization in those at higher risk, specifically including older adults and the immune compromised. We think the emergence of new variants of concern will also have the risk of accelerating waning and broadening the risk of breakthroughs to other populations. So, the desired features for our Northern Hemisphere fall and winter 2022 booster are described here. First, we’d like to improve the durability of protection for neutralizing antibodies against Omicron and Omicron mutations to at least six months that will provide full protection through the Northern Hemisphere fall-winter infection season. We’d like to retain the high and durable protection we’ve been seeing with a prototype vaccine against Delta and the ancestral strains. And third, we’d like to broaden cross-protective immunity to the extent possible to increase the potential for protection against a new emergent variant of concern, which could emerge perhaps from the Southern Hemisphere this midyear. So on slide 17, I’ll quickly summarize our strategy for developing an updated booster for fall 2022. We are currently evaluating three different booster strategies in adults age 18 plus. The first, as both Paul and Stéphane have mentioned, is a bivalent booster vaccine, made up of the prototype mRNA-1273 and an Omicron-specific mRNA-1273.529. This bivalent has been called 214. We are also evaluating, as we previously announced, an Omicron-specific booster, mRNA-1273.529. And of course, we will continue to evaluate our prototype booster, mRNA-1273, for which there is a large body of real-world evidence, as Paul just described. We’re evaluating these three different approaches across two studies in the United States and the United Kingdom, the Phase 2 study in the United States of approximately 750 participants and a 3,000-participant study in the United Kingdom. Both are looking at both bivalent and Omicron-specific boosters. And both will be looking at both, third and fourth dose of those boosters. In the UK study, we will also be looking at heterologous boosting, including on the background of other mRNA vaccines and non-mRNA vaccines. Now, I’d like to take a moment on slide 18 to provide some scientific insight to why we believe the bivalent vaccine booster for the fall of 2022 offers a potential advantage. Slide 18 includes data on some of our prior bivalent boosters. And this data -- this emerging data suggests to us that there may be an opportunity to improve durability against variants of concern while preserving activity against the ancestral variants. This data is based on one of our prior bivalence, mRNA-1273.211, or 211 for short. And 211, as you may recall, was based on the 1273 vaccine and the Beta variant of concern, which emerged approximately a year ago. When we compare over time how the two different booster strategies, our prototype booster on the left-hand column here, and our bivalent booster on the right-hand column here, do against the two different virus variants that were in the vaccine, you see an emergence of potential improvement in durability. So, first, to orient you to the slide. mRNA-1273 was given at 50 micrograms as a booster to those who had previously received two doses of the mRNA-1273 vaccine. And on the top left panel, you’ll see how the neutralizing titers or pseudovirus neutralizing titers against the ancestral strain of the virus, the D614G virus, in our validated clinical assays. Underneath there, you’ll see how those -- the pseudovirus neutralization titers against the Beta variant of concern in blue. And in the middle column, you’ll contrast that with a bivalent 211 booster, which, in this case, included the Beta variant of concern, again, at the same dose level, 50 micrograms. Top right panel is the ancestral variant of concern, ancestral virus, D614G, and lower right is the Beta variant of concern or the B1.351. Now, as you’ll note, comparing the performance against the ancestral D614G virus, both mRNA-1273 and the bivalent Beta containing booster do a good job boosting neutralizing titers by day 29 after the booster. So, one month post booster, neutralizing titers are approximately 1,800 for 1273 and 2,200 for the bivalent. And importantly, as we test the serum six months after booster, noted as day 181 here, you’ll see that neutralizing titers remain high, approximately 1,000 in both boosters. Now, the situation against the variant of concern, in this case, Beta, is slightly different. Again, both boosters, increased neutralizing titers by day 29 one month after booster to quite reasonable levels, approximately 1,000 in both cases. However, when you follow out six months, there is a difference in the neutralizing titers that emerges. And not surprisingly, the bivalent booster, which includes the Beta variant of concern, starts to see more durable neutralizing titers, 402, as noted here, as opposed to 154 for mRNA-1273. So, in summary, six months after a 211 bivalent booster, the neutralizing titers against the Beta variant of concern appear to be more durable than with just a prototype booster. And the durability or the rate of decline for the Beta neutralizing titers more closely matches that seen for the ancestral virus following the bivalent 211 booster. Including the Beta variant of concern, therefore, appears to be improving the durability of neutralizing titers against that variant of concern. Now on the next slide, slide 19, we have that same data, but now plotted as a function of time to help you visualize it a little more clearly. On the left-hand side, we’re contrasting the mRNA-1273 booster as a black line against a bivalent Beta containing booster in the red line. On the left-hand side, you’re again looking at the ancestral D614G neutralizing titers. And as you can see, following a booster approximately six months after booster dose two, neutralizing titers for both of the boosters, both bivalent and the prototype vaccine, increased significantly. And the data we have out to six months, if you project that forward as we do with the dotted lines, suggest that we will maintain quite high neutralizing titers, perhaps as long as one year. Now, the situation on the right-hand side highlights we think the potential for improving durability with a bivalent vaccine. Again, here, the black line is mRNA-1273 and the red line is the bivalent Beta containing booster at the same dose level. Now, while both boosters increase neutralizing titers to approximately 1,000 within one month of boosting, what starts to emerge six months later is a different degree of durability in those neutralizing titers, with the bivalent vaccine containing the Beta antigen doing slightly better, as you can see with the red line. And if you project that forward, it suggests that the bivalent vaccine neutralizing titers against the Beta variant concern will remain quite high, perhaps as long as a year, whereas with a prototype vaccine, those neutralizing titers appear to be decaying more quickly, back towards baseline levels or pre-booster levels by approximately 8 to 9 months. On slide 20, just to quickly summarize therefore where we are in COVID-19 booster development for fall 2022. We believe that a seasonal booster will be necessary to prevent breakthrough diseases, including hospitalization in vulnerable populations. And we believe that the continued evolution of the virus is going to continue to put pressure on pre-existing immunity, whether that’s naturally derived or vaccine provided. We think the fall 2022 booster should reflect the diversity of circulating mutations that are out there in order -- and seek to achieve greater than six months of neutralizing titer durability to increase the potential for protection throughout the entire fall season, in this case, we think September through February. So, Moderna is developing an Omicron-containing bivalent booster, based on data that we have from prior bivalent candidates that suggests that incorporating the variant of concern of those mutations from that variant of concern has the potential to improve the durability against such variant of concern. Now, moving to slide 21, just quickly catching up on other developments in our COVID-19 vaccine. We have made progress in primary series and booster in adolescent and pediatric populations. So, in adolescents first, we’ve received regulatory approvals for Spikevax in Europe, United Kingdom, Australia, Canada and many other countries. In U.S., we plan to submit an EUA for 100 micrograms of mRNA-1273 in adolescents that are immune compromised or an elevated risk of severe outcomes. And we’re also evaluating the potential of a lower dose, 50 micrograms, as a primary series. And lastly, as has been noted previously, we’re preparing to submit data for 50 micrograms as a booster dose in adolescents and 50 micrograms as the booster dose in adults as well. And that will include data on heterologous boosting. In pediatrics, or the 6- to 11-year old, we received provisional approval for Spikevax in Australia and submitted to multiple other international regulatory agencies and expect authorization shortly. The U.S. submission is pending alignment with the United States FDA on the adolescent application. And we will also continue to evaluate lower doses, including a 25-microgram primary series dose. Finally, in the youngest, 6 months to 5-years old pediatric population, we expect data on our 25-microgram two-dose primary series in the first quarter. And pending that data, we’ll plan to submit to regulators. We are also continuing to evaluate lower doses and the potential of a third dose in that population. Pivoting to the broader respiratory vaccine portfolio on slide 22. Beyond COVID-19, we continue to make progress across all of our respiratory vaccines. As Stéphane mentioned, our flu vaccine is fully enrolled with Phase 2. And pending that data, we will prepare to move forward, which we still anticipate doing in 2022 into a Phase 3 study. We’re also preparing to start a combination flu and COVID vaccine, which is currently in preclinical, but we expect to start the Phase 1 study this year. Our older adult RSV program has started its Phase 3 study portion, and that pivotal study is ongoing enrolling. We have a pediatric RSV study, which we will move forward in Phase 1. We have also two different respiratory combination vaccines. First, the human metapneumovirus parainfluenza virus 3 vaccine, which is in Phase 1b and has now fully enrolled, and an RSV plus hMPV vaccine, which remains in preclinical development, and we hope to start shortly. Moving now to latent and public health vaccines on slide 23. As discussed, CMV continues to enroll in the Phase 3 CMVictory study. We have also moved forward two new latent virus vaccines in the clinical testing, our EBV vaccine to prevent infectious mononucleosis is in Phase 1, and our HIV -- our first HIV vaccine, mRNA-1644, is also in Phase 1. We announced two new development candidates, which I’ll cover briefly in the next couple of slides, against HSV and VZV. And our public health vaccines against Zika and Nipah continue to progress. Briefly on slide 24, I’d like to introduce our -- the first of our two new development candidates in this space. mRNA-1608 is our vaccine against Herpes simplex virus 2. HSV-2 primarily infects the genitals and establishes lifelong latent infections within the sensory neurons. There is a significant burden of disease in developed markets, including approximately 18 million people who are HSV positive, HSV-2 positive in the United States. Globally, that represents about 5% of the population. Primary burden of disease is a reduction in quality of life from recurrent lesions. Our mRNA-1608 vaccine encodes antigens on the surface of the HSV virus and has been able to induce very strong immune responses, as illustrated in the figure to the right. Neutralizing titers in mice following an HSV-2 vaccine with mRNA-1608 are significantly above the levels seen in human sero from those who are seropositive. This gives us reason to believe that we will be able to provide a significant benefit with this vaccine in this population. The second development candidate is on the following slide, slide 25. This is our mRNA-1468 program against herpes zoster or shingles. Herpes zoster is caused by the reactivation of latent varicella-zoster virus, or VZV for short. It’s principally a disease that’s seen as a result of declining immunity in older adults, where protection against VZV decline, leading to reactivation of the virus and painful and very itchy lesions. Herpes zoster occurs in about one out of three adults in their lifetime. And the incidence is increasing as populations age, and particularly increases over the age of 50. On the right-hand side is previously published data in the Journal of Vaccine on our VZV vaccine, in this case, mRNA-1468. Our vaccine in nonhuman primates was compared against the protein and protein plus adjuvant, as they stand in, a proxy for the shingles vaccine, which is already approved for this indication. As you note on the right, in nonhuman primates, the mRNA vaccine against gE resulted in significant and elevated neutralizing titers after two doses, and we believe will provide the basis for a strong potential clinical benefit with mRNA-1468. Moving now to our therapeutic pipeline. We continue to make progress across a range of different programs. On slide 26, I’ll note a few very quickly. First, our PCV program in Phase 1 is ongoing and the Phase 2 is fully enrolled. We expect data in the fourth quarter of 2022. We are also going to provide a bit of an update on the checkpoint vaccine and newly announced development candidate in just a minute. Highlighting in other therapeutic areas, our VEGF program continues to move forward in Phase 2 with AstraZeneca. And in rare diseases, our PA and MMA programs continue to enroll in their Phase 1, with a Phase 1 -- first dose level cohort fully enrolled in PA and continued enrolling of additional cohorts. We also continue to make progress across all of our other preclinical programs in rare diseases, including GSD1a, PKU, CN-1 and the cystic fibrosis program with Vertex. On slide 27, I’d like to briefly cover our latest development candidate, a checkpoint vaccine to promote anti-checkpoint T-cell responses in cancer, otherwise known as mRNA-4359. So briefly, the objective of this program is to stimulate effector T cells that target and kill suppressive immune in cancer cells that express high levels of target checkpoint antigen. We previously identified that there are pre-existing IDO and PD-L1 specific T cells that have been identified in cancer patients and tumors. IDO and PD-L1 specific T cells can kill and remove the immunosuppressive regulatory immune cells and cancer cells that overexpress these antigens. It’s an important counterbalance that helps liberate the immune response against the tumor. Our vaccine can expand IDO and PD-L1 specific T cells in preclinical models. And the vaccine induced direct tumor cell killing can facilitate recognition of tumor-associated antigens by other cytotoxic T cells, leading to more broad tumor killing. Systemic blockade with PD-1 or PD-L1 antibodies may further amplify this effect. We will initially be developing mRNA-4359 against indications, including first-line cutaneous melanoma stage IIIb and first-line non-small cell lung cancer. With that, I’d like to turn it over to David to walk you through the financials.