TWiV reviews eukaryotic viruses recovered from ancient permafrost, a mistake made by scientists on Omicron origins, and close relatives of MERS-CoV from bats that bind ACE2 for entry into cells.
Michael Letko joins TWiV to discuss his research on understanding cell receptors required for sarbecovirus entry, including an ACE2-dependent isolate from Russian bats that is resistant to vaccine-induced antibodies.
TWiV discusses a new henipavirus from fruit bats in Madagascar, and attenuation of SARS-CoV-2 Omicron disease in mice caused by genome mutations outside of the spike protein coding region.
TWiV discusses the virome of game animals in China, and the finding that binding of sarbecoviruses to ACE2 is an ancestral and evolvable trait.
TWiV reviews the new nomenclature for SARS-CoV-2 variants, effectiveness of Pfizer/BioNTech vaccine against variants, modified Moderna vaccine against variants, impact of COVID-19 interventions on influenza in China and the US, and binding of RaTG13 spike protein to ACE2 of multiple species.
TWiV reviews the difficulties in predicting species susceptibility to SARS-CoV-2 infection by only examining the ACE2 protein, and the olfactory mucosa as a portal of entry into the central nervous system in COVID-19 patients.
Daniel Griffin provides a clinical report on COVID-19, then we discuss Bill Foege’s letter to CDC director Robert Redfield, the false promise of herd immunity for COVID-19, secret blueprints for SARS-CoV-2 vaccine trials released, and neuropilin-1 as a possible entry protein for the virus.
Daniel Griffin provides a clinical update on COVID-19, then Ralph Baric joins TWiV to discuss SARS-CoV-2 transmission, vaccines, diagnostic tests, and a new animal model from his laboratory that does not use transgenic mice.
Vincent, Kathy and Rich discuss COVID-19 research paper overload, Moderna’s mRNA vaccine Phase I results, increase of ACE2 RNA by cigarette smoke, and answer listener questions.
The TWiV team returns this week to SARS-CoV-2019 coverage to review the latest epi curves, the fatality rate, furin cleavage site and receptor binding domain in the spike glycoprotein, related CoV recovered from pangolins, evidence that the virus did not escape from a laboratory, and many more questions sent in by listeners.