Stephen Hoge
Analyst · Goldman Sachs
Thanks, Paul. Good morning and good afternoon, everyone. So, Paul just shared with you the effectiveness of our booster MRNA-1273 against Omicron in the real-world setting. But on slide 15, I’d like to pivot to our strategic rationale for why we think a seasonal booster will be necessary. So, first, we think neutralizing titers will wane similar to the endemic human coronaviruses. And that decline in neutralizing titers will increase their risk of breakthrough, infection and hospitalization for those at higher risk, particularly as Paul just described, older adults or those with medical immunocompromised. The emergence of new variants of concern like the BA.4, .5 subvariants could accelerate the impact of that waning and broaden the risk of breakthrough across the population. So, with that, we do believe a booster will be needed in the fall, and we’re working hard to make improvements to our available boosters. The desired features for a Northern Hemisphere fall-winter booster, we think will be that it improves the durability of protective neutralizing antibodies against Omicron and its subvariants beyond six months, i.e., the full Northern Hemisphere fall or winter infection season. We’d like to retain high and durable protection against Delta and ancestral strains. And we’d like to broaden cross-protective immunity to increase the potential for protection against new emergent variants or subvariants that might happen over the coming months. So, on slide 16, I’d like to summarize our work in developing that improved booster. Our primary focus, as you know, has been on developing a bivalent vaccine, and we have taken three bivalents into clinical trials. The first, mRNA-1273.211 includes 9 of the common mutations and was based on a combination of our prototype wild-type vaccine and Beta. The mRNA-1273.213 bivalent included 11 mutations based on what had emerged from Beta and Delta. And our mRNA-1273.214 booster includes 32 mutations, also now based on the wild-type, prototype vaccine and the combination with the Omicron original variant of concern. Our latest bivalent, mRNA-1273.214, that includes those 32 mutations that have emerged, remains our lead candidate for the fall Northern Hemisphere campaign. The objective of that booster will be to demonstrate superior immunogenicity against variants of concern when it compares to our approved current prototype booster or MRNA-1273 at 50 micrograms. And of course, we want to maintain non-inferiority against ancestral strains in case they reemerge. Now, on slide 17, I’ll summarize the ongoing clinical development work across that portfolio of bivalent boosters. I’ll remind you that mRNA-1273 has been authorized or approved in many markets as a third and even a fourth booster. The data for the first bivalent mRNA-.211 has already demonstrated superiority against all variants of concerns tested, including Omicron and Delta, and I’ll cover that data in just a moment. But, our lead candidate remains, as I said a moment ago, our mRNA-1273.214, which is being evaluated in two separate studies, a Phase 2/3 in the United States and a Phase 3 P305 study in United Kingdom. Again, both of those are being conducted at a booster dose of 50 micrograms. Now, on slide 18, just quickly to update you on the data we have from the .211 first bivalent. Not surprisingly, the safety and reactogenicity profile of the bivalent boosters is consistent with what we saw with mRNA-1273. As you’ll see on the chart, both solicited adverse local reactions and systemic reactions are broadly consistent in both frequency and severity. And the frequency and types of unsolicited adverse events were also comparable between the groups with no serious adverse events in the bivalent vaccine group up to 28 days after the booster dose. Moving to slide 19. We have some of the neutralizing antibody data from that study, evaluating again our mRNA-1273.211 bivalent and comparing that with an approved or authorized mRNA-1273 booster. Looking at neutralizing titers and GMTs, both immediately pre-booster at 1 month or day 29 and at 6 months, on day 181 across the 3 variants of concern which we tested, higher neutralizing titers were seen for day 29 and day 181 across all the variants of concern with the bivalent booster. On slide 20, we represent that as a ratio when comparing the performance of the bivalent booster to mRNA-1273 at 1 month and 6 months, and superiority was met for the ancestral and all variants of concern at different time points, as you’ll note here. The clinical endpoint for superiority was defined as a geometric mean titer ratio, or GMR, where the lower bound excluded -- the lower bound of the 95% confidence interval excluded 1. And as you’ll note, at day 29, a GMR for the ancestral SARS-CoV-2 virus was 1.28, Beta was 1.3, Delta was 1.75, and importantly, Omicron was as high as 2.2. And the 95% confidence interval for Omicron, the lower bound was 1.74, again, demonstrating strong trend towards superiority in this data. Excitingly, at day 181 or 6 months, that superiority was also met for the ancestral virus, Beta and the Omicron variant, which is important because the primary goal we have here is to improve the durability of protection by increasing those titers. So, on slide 21, in conclusion, the safety and reactogenicity profile of the 50-microgram bivalent 211 booster was comparable to the 50-microgram of the authorizer approved 1273 booster. And we believe that the superiority already demonstrated by the bivalent platform in .211 bodes well for our overall strategy. We continue to believe that bivalent boosters will ensure the broadest immunity across the evolutionary uncertainty of SARS-CoV-2 and maintain current protection while expanding the breadth and durability of neutralizing antibodies, including, as I just demonstrated a moment ago with .211, out to 6 months. We anticipate the one-month or day 29 data from our Omicron containing bivalent, mRNA-1273.214 in June of 2022. Now, turning to the rest of our respiratory vaccine pipeline on slide 23. We announced positive Phase 2 data from our flu vaccine, mRNA-1010 at our Vaccines Day event. mRNA-1010 is our -- is part of our speed-to-market approach. We plan to start a Phase 3 immunogenicity study in the second quarter of this year and a Phase 3 efficacy trial later this year with mRNA-1010. As part of our flu vaccine strategy, we are also advancing in parallel vaccine candidates that contain both HA antigens and NA antigens. We started a Phase 1/2 trial of mRNA-1020 and mRNA-1030 last month. Our RSV vaccine, mRNA-1345, a Phase 3 trial in older adults is ongoing, and we are enrolling participants worldwide. We also have an ongoing pediatric RSV trial enrolling as well. In combination, we plan to start a Phase 1 trial for both, our COVID plus flu and our COVID flu RSV vaccines this year. Our Phase 1 trial for the hMPV/PIV3 combination vaccine is also now fully enrolled. And our RSV and hMPV combo and our endemic human coronavirus vaccine combo are in preclinical. Before moving from respiratory vaccines, I want to take a step back and reflect on the incredible progress over the past two years. We have or will have progressed 3 candidates into pivotal Phase 3 studies within one year of an IND being opened. This speed is made possible by our mRNA platform. And we believe our COVID vaccine success has derisked our vaccine pipeline, and we can now move quickly into our RSV and flu pivotal studies. Importantly, in RSV and flu, we are looking at seasonal endpoints or immunogenicity endpoints, which we believe can be -- can allow us to progress faster through Phase 3 towards its readouts and ultimately to commercialization. Now, turning to the rest of our pipeline. We have an ongoing Phase 3 study for our CMV vaccine, mRNA-1647, which is enrolling well and is now enrolling participants globally. Our EBV vaccine to prevent infectious mononucleosis is in Phase 1, and our EBV vaccine to prevent long-term sequelae such as multiple sclerosis is in preclinical studies. Our HIV vaccines are in Phase 1 clinical trials with our partners. And the recently announced HSV and VZV vaccines are in preclinical studies. Within public health vaccines, our Zika vaccine continues to enroll in Phase 2. And we are pleased to update that our Nipah virus vaccine IND was opened, and we look forward to starting that trial soon with our partner. Now, moving to our therapeutic pipeline on slide 26. Within oncology, our personalized cancer vaccine is ongoing in a Phase 1 study and a Phase 2 study. And we expect the first look at the data from our Phase 2 study, which is evaluating personalized cancer vaccine plus KEYTRUDA versus KEYTRUDA alone, in the fourth quarter of this year. We have four other candidates in Phase 1 or preclinical stages across oncology. In cardiovascular and autoimmune, we have two candidates in each area in clinical trials or in the preclinical stage. And within rare diseases, our propionic acidemia program, or PA program for short, which I will give more detail on the next slide, is ongoing in a Phase 1/2 study. Our MMA program is also ongoing in the Phase 1/2 study. And our GSD1a program has an open IND and we look forward to enrolling the first patient or participants in that study. We have three other candidates in preclinical and rare disease as well. Now, before I hand it off to David, on slide 27, I wanted to provide a bit more color on our Phase 1/2 study in propionic acidemia. As a reminder, PA is a rare metabolic disorder that is characterized by a deficiency of propionyl-CoA carboxylase, an enzyme that’s involved in the breakdown of several of the building blocks of proteins called amino acids. As a result of deficiency in that enzyme, harmful intermediate compounds can build up to toxic levels in the body. This can lead to serious health problems, including recurrent episodes of life-threatening metabolic decompensation events. Our therapy for PA encodes for two of those proteins that form the deficient enzyme, PCCA and PCCB, and has 1 mRNA for each in the drug. The Phase 1/2 study is an adaptive trial design, enrolling participants greater than one years of age in the United States, United Kingdom and Canada. Participants received one dose of mRNA-3927 every 2 or every 3 weeks for up to 10 doses in that study. The first cohort is fully enrolled, and we are now enrolling patients in the additional cohorts. Five patients have now completed the initial 10-dose course of the study and became eligible for continuing dosing in the open-label extension. And all five of those patients have elected to participate in the OLE. A total of 75 doses have now been administered across Phase 1/2 and the OLE study. Now, the study is focused on evaluating safety and PK/PD. It is also looking at clinical events, those that are most important, including the metabolic decompensation events I mentioned previously. And of course, we are also evaluating potential biomarkers in the study. We look forward to enrolling more patients and sharing the data this year. And with that, I’d like to turn this over to our financial review. And David?