Data Show No Detectable Levels of Infectious Virus in Lungs of Vaccinated Mice Following Challenge with SARS-CoV-2
Sterilizing Immunity Believed to be Critical for Blocking Viral Transmission
Phase I Clinical Trial of AdCOVID Expected to Report Data in June 2021
Altimmune, Inc. (Nasdaq: ALT), a clinical-stage biopharmaceutical company, today announced positive results from a preclinical study of AdCOVID in a SARS-CoV-2 challenge model of infection. In this study, a single intranasal dose of AdCOVID provided sterilizing immunity in the lungs of vaccinated mice, in contrast to the development of dense pulmonary infection and disease in the lungs of non-vaccinated mice following infection with SARS-CoV-2. AdCOVID is a novel, single-dose intranasal vaccine candidate for COVID-19.
“These latest data are very exciting, as they confirm and expand upon the numerous potential advantages of our differentiated intranasal vaccine approach,” said Scot Roberts, Ph.D., Chief Scientific Officer at Altimmune. “In the current study, we found a heavy burden of infectious SARS-CoV-2 virus in the lungs of non-vaccinated mice following challenge with the virus. Importantly, no detectable levels of infectious virus were observed in the lungs of AdCOVID-vaccinated animals.”
Dr. Roberts continued, “These data suggest that a single intranasal vaccination with AdCOVID may provide sterilizing immunity that neutralizes infectious virus, which is believed to be the best way to block viral transmission. Blocking transmission is critical for preventing spread of the virus and preventing the emergence of new variants of concern, both of which have the potential to prolong the pandemic. We continue to be encouraged by the accumulating preclinical data for AdCOVID and look forward to reporting the results of our ongoing Phase 1 clinical trial later this quarter.”
“Growing vaccine hesitancy, which is emerging as a real problem in the fight against SARS-CoV-2, underscores the importance of developing novel vaccine approaches like AdCOVID, which is a needle-free, thermostable vaccine that may be delivered in a single-dose and has the potential to prevent SARS-CoV-2 transmission. These attributes could foster vaccine acceptance, both nationally and globally. In addition, intranasally delivered AdCOVID could play a critical role in re-vaccination campaigns to control future spread of the virus, and ultimately to help bring an end to this devastating global pandemic,” said collaborator Frances Lund, Ph.D., Charles H. McCauley Professor and Chair for the Department of Microbiology at the University of Alabama at Birmingham (UAB).