Gregory M. Glenn
Analyst · FBR Capital Markets
Thanks, Stan, and good afternoon. We announced a number of clinical and preclinical accomplishments in the third quarter that speak to the pace of our development programs, the focus of our team and execution, all together that build the foundation for moving these programs into the later stages of their development. So I'll start with a review of the RSV accomplishments in the last few months. We recently presented data at the 8th International Society of Vaccine Congress in Philadelphia, Pennsylvania. That conference highlighted new findings from our first Phase II clinical trials, known as M201, in 330 women of child-bearing age. In this trial, all the vaccinations were completed by day 56. And from day 56 to day 112, subjects passed through what approximates an RSV season from December to March. During this period, 27 of the placebo recipients had evidence of new RSV infection compared to only 10% in immunized participants, representing a 50% reduction in infection rate. From our perspective, this is an important finding. Although the trial is not designed to observe efficacy, it was an opportunity to look post hoc at infection rate using Western blot, a classic tool for diagnosing infections using subject sera. The observed reduction in infection rates in vaccinees compared to placebo indicates that the vaccine has potential to provide protection against RSV disease. I would note that the vaccine trial's prevention of infection is a higher hurdle compared to the prevention of disease or prevention of more severe disease. If one of us was influenced [ph] in the influenza or rotovirus trials, for example, vaccine efficacy is always greater as the influenza becomes more severe. Thus, a reduction in infection should translate to a greater rate of reduction of disease in subjects that have more severe disease. The additional barriers that may also come from the [indiscernible], a progression of RSV in the respiratory tract and the nodes to the lower respiratory tract in the lungs where it causes disease. The data also suggest that we may observe prevention of RSV infection and disease in pregnant women in our future trials. And thus, the vaccine will benefit both the infant and the mother, which would be in line with licensed vaccines such as influenza toxics [ph] that are used currently for maternal immunization. Now building on our maternal immunization strategy, we presented preclinical data at the 54th Interscience Conference on Antimicrobial Agents and Chemotherapy, also known as ICAAC, showing that immunization of pregnant nonhuman primates with the RSV vaccine in their trimester of pregnancy generates anti-F antibodies [indiscernible] antibodies to neutralize antibodies that are transferred to the newborn infants. And, more significantly, that those infants were protected against RSV challenge. Data on these studies further support our maternal immunization strategy, though a key step forward in this strategy was the mid-September initiation for a Phase II clinical trial in healthy women in the third trimester of pregnancy. In addition to evaluating the safety, immunogenicity of the RSV vaccine, the trial will also assess the impact of maternal immunization in infant safety in RSV-specific antibodies through 1 year and 6 months of life. This is -- this study is a randomized blind placebo control Phase II study that will enroll 50 healthy women in their third trimester. Enrolled maternal subjects will be randomized to receive placebo or 120 micrograms of the RSV F vaccine with aluminum as adjuvants. Maternal subjects will be followed through pregnancy, delivery and for an additional 80-day post partum to assess the safety and immunogenicity as measured by serum RSV F IgG antibody concentration, palivizumab-competing antibody and their neutralization titers. Upon delivery, cord blood samples will be used to determine concentration of these same antibodies, the RSV F IgG, palivizumab-competing, and microneutralizing antibody. Additional serum samples from different subjects will be [indiscernible] under the following 6-month period, will provide a preliminary understanding of the half-life of maternal antibodies in the infants. Infant subjects will be followed for 1 year post [indiscernible] to assess the safety of the RSV F vaccine in the maternal immunization study. Next, in mid-October, we initiated a Phase II clinical trial of our RSV F vaccine in healthy elderly subjects. This trial is also a randomized observer-blinded placebo-controlled study. It's scheduled to enroll 1,600 subjects greater than 60 years of age at 10 sites in the United States. The trial will evaluate the incidence of all respiratory illness due to RSV, including medically attended respiratory illness, hospitalization, and illness in community living elderly adults who have been treated with placebo. The study will evaluate the safety and immunogenicity of the vaccine. It will also estimate the efficacy of the RSV vaccine in reducing the incidence of respiratory illness due to RSV. We note there are approximately 57 million individuals over the age of 60 in New York. This suggests that the elderly market for this may be the largest value driver in our RSV franchise. RSV is increasingly recognized by the medical and scientific community as a pathogen of great importance in this population. Now moving to our influenza program. The highlight this quarter was the positive top line data from our Phase I/II clinical trial of the H7N9 Avian Influenza VLP vaccine candidate with our proprietary adjuvant Matrix M. I'm now going to provide significant details we discussed at length in our analyst and investor meetings in September. This trial enrolled 610 subjects, healthy subjects, to evaluate safety, immunogenicity, responses to the vaccine and the adjuvant. This trial evaluated 3 different dose levels of the antigen and 2 dose levels in the adjuvant. Overall, Matrix M adjuvant formulations demonstrated clear immunogenicity benefits relative to unadjuvanted antigens and the dose response within the adjuvanted groups. Antigen dose-sparing was shown and inhibition [ph]antibody titers after 2 vaccine doses were comparable to those reported in prior studies with another saponin-based adjuvant. We believe this trial will reach a dose confirmation trial in healthy elderly adults followed by a Phase III immunogenicity trial. Recently, we were pleased to receive word that the FDA -- from the FDA that the H7N9 VLP vaccine was granted FDA fast-track designation. We believe this designation underscores the FDA's recognition of the risk of H7N9 influenza for lack of any approved vaccine for the H7N9 vaccine -- influenza, and the strength of our H7N9 VLP. Lastly, we reported on our Ebola glycoprotein recombinant nanoparticle vaccine candidate, which is based on the 2014 Guinea Ebola strain that is responsible for the current Ebola disease passing from human to human in West Africa. We are developing our recombinant Ebola vaccine using the same platform we used to develop vaccine candidates against several pathogens, including RSV, seasonal and pandemic influenza and MERS, Middle Eastern Respiratory Syndrome. In preclinical models, the Ebola VLP vaccine candidate is serum-protected [ph] [indiscernible] antibodies in cross neutralization to an older strain of Ebola. We recently initiated a nonhuman primate study and our goal is to initiate a Phase I clinical trial in December of 2014 to evaluate the safety and immunogenicity of our Ebola vaccine. So with that, I will turn the call back to Stan. Thank you.