Release Date: March 20, 2025
For the complete transcript of the earnings call, please refer to the full earnings call transcript.
Q: Can you provide details on the new Phase 1 study for Norovirus, specifically whether the second-generation product is bivalent or monovalent, and the demographics of the trial participants? A: The Phase 1 study is enrolling participants aged 18 to 49. The second-generation product includes G11 and G24 constructs. Minor changes to the DNA backbone and antigen sequence have enhanced expression in intestinal epithelial cells, leading to greater immune responses in preclinical models. (James Cummings, Chief Medical Officer; Sean Tucker, Chief Scientific Officer)
Q: How might the greater immune response seen in animal data for the second-generation Norovirus vaccine translate to efficacy in humans? A: The expectation is that even a small increase in immune response in humans could significantly improve protective efficacy due to the exponential amplification of the signal. This is based on mathematical modeling of necessary antibodies in the intestinal space and serum. (Sean Tucker, Chief Scientific Officer)
Q: What immunogenicity measurements should be focused on for the Norovirus Phase 1 study, and how do they translate into protective efficacy? A: The study will measure serum Norovirus blocking antibody assay titers and fecal IgA, both of which correlated with protection in previous challenge studies. These are key indicators of efficacy. (Sean Tucker, Chief Scientific Officer)
Q: Has the FDA seen the data for the COVID-19 sentinel cohort, and what was their response? A: Yes, the data was sent to the FDA simultaneously with the DSMB. The DSMB recommended proceeding without modifications, underscoring the robust safety profile of the vaccine candidate. The FDA has reviewed the data, and there is no hold on moving the program forward. (James Cummings, Chief Medical Officer)
Q: How does the stop work order impact manufacturing for the COVID-19 trial, and what is the shelf life of the product? A: Vaxart maintains its own GMP manufacturing facilities in the U.S., allowing quick pivots in support of trials. The shelf life of the product is expected to last for two years, and the company is confident in adjusting to the stop work order as needed. (Ray Stapleton, Chief Technical Officer)
For the complete transcript of the earnings call, please refer to the full earnings call transcript.
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