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The TWiVsters explain how the shape of pleomorphic virus particles – spherical or filamentous – determines the probability of virus attachment and fusion, and resistance to selective pressure such as antibodies that block cell entry. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, and Amy Rosenfeld Subscribe (free): iTunes, Google Podca…
 
TWiV reviews a drug screen for inhibitors of syncytium formation, the fusing of cells caused by SARS-CoV-2, which reveals that the process is regulated by a calcium-activated ion channel and scramblase that is inhibited by the anti-parasite drug Niclosamide. Hosts: Vincent Racaniello, Alan Dove, Rich Condit, and Brianne Barker Subscribe (free): iTu…
 
In COVID-19 clinical update #57, Daniel Griffin covers children and MIS-C, school opening plans, transmission event with masks, fomite transmission, diagnostic test performance, AZ vaccine and blood clots, and long COVID and the effect of vaccines. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTunes, Google Podcasts, RSS, email Be…
 
The Guardians of the TWiV-o-verse discuss the process of codon deoptimization for the production of experimental infectious attenuated viral vaccines, and how a respiratory syncytial virus with 619 base changes was rescued by genomes with very large internal deletions. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, Kathy Spindler, and …
 
Arturo Casadevall joins TWiV to discuss the use of convalescent plasma to treat COVID-19, including a history of the process, how plasma is prepared and tested, why it is difficult to conduct randomized clinical trials, how this treatment has fared and his hopes for the future. Hosts: Vincent Racaniello, Alan Dove, Rich Condit, and Brianne Barker G…
 
In COVID-19 clinical update #56, Daniel Griffin note increasing hospitalization in children and young adults, Pfizer vaccine efficacy results in 12-15 year olds, rapid self administered nucleic acid and antigen tests, mRNA vaccine efficacy in real world conditions, and improvement of long COVID after vaccination. Hosts: Daniel Griffin and Vincent R…
 
John, Monica, and Davida join TWiV to discuss development of a method to detect SARS-CoV-2 in raw sewage from all 14 of New York City’s treatment plants, and its use to determine the presence of the genome throughout the pandemic and detection of genome mutations from variants of concern. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, …
 
Alessandro Sette joins TWiV to discuss the role of T cells in COVID-19, the finding that amino acid changes in SARS-CoV-2 variants of concern have a negligible impact on T cell reactivity in convalescent patients and vaccinees, and whether a next generation vaccine should include more viral proteins than spike. Hosts: Vincent Racaniello, Alan Dove,…
 
In COVID-19 clinical update #55, Daniel Griffin reviews recommendations for keeping transmission low in school settings, optimal testing strategies for schools and businesses, impact of vaccines on asymptomatic infections, vaccine safety in PASC patients, and early use of aspirin associated with decreased mortality. Hosts: Daniel Griffin and Vincen…
 
Susan Weiss returns to TWiV to discuss coronavirus entry into cells and the role of spike protein cleavage by proteases, why lab escaped hypotheses for SARS-CoV-2 are unlikely, and modulation of innate immune responses during infection. Hosts: Vincent Racaniello, Rich Condit, Alan Dove, Brianne Barker, and Amy Rosenfeld Guest: Susan Weiss Subscribe…
 
In COVID-19 clinical update #54, Daniel Griffin covers effectiveness of 3 vs 6 ft physical distancing, effectiveness of masks, physical distancing, and eye shields, second vaccine dose completion, alleviation of COVID-19 symptoms after vaccination, vaccine trials in children, and IDSA approval of a mAb cocktail. Hosts: Daniel Griffin and Vincent Ra…
 
Forest and Maria-Isabel join TWiV to discuss their their project to engage thousands of citizens to swab inanimate surfaces in the San Diego area, then send the samples to the Rohwer Lab for nucleic acid analysis. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free): iTunes, Google Podcasts…
 
On a TWiV tetramer, we review the ongoing outbreaks of Ebolavirus disease in DRC and Guinea, evidence that SARS-CoV-2 infections in children are far more prevalent than are being detected, and recent long COVID estimates from the UK. Hosts: Vincent Racaniello, Rich Condit, Alan Dove, and Brianne Barker Subscribe (free): iTunes, Google Podcasts, RSS…
 
In COVID-19 clinical update #53, Daniel Griffin reviews underreporting of infections and long term disease in children, a blood test for T cells, results of phase 3 trials for monoclonal antibodies, preliminary findings on an oral antiviral, clinical trial of ivermectin, and recommendations for upcoming gatherings. Hosts: Daniel Griffin and Vincent…
 
Matt Frieman returns to TWiV to discuss the COVID-19 pandemic from the point of view of a coronavirologist, including his work with Novavax on their spike protein-based vaccine. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, Kathy Spindler, and Brianne Barker Guest: Matt Frieman Subscribe (free): iTunes, Google Podcasts, RSS, email Bec…
 
TWiV notes the passing of Mavis Agbandje-McKenna, and reviews data on maximizing fit for cloth and medical procedure masks, SARS-CoV-2 total and subgenomic viral load in hospitalized patients, and effect of changes in spike protein on efficacy in a mouse model of infection. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and …
 
In COVID-19 clinical update #52, Daniel Griffin reviews differences in attack rates between children and adults, J&J vaccine phase III data, G6PD deficiency and vaccines, NIH halts convalescent plasma trial, dexamethasone in hospitalized patients, data on tocilizumab, and long COVID in children. Hosts: Daniel Griffin and Vincent Racaniello Subscrib…
 
Janet Iwasa joins TWiV to recount how she became a molecular animator, including a pivot during her Ph.D. thesis research, the value of animations in science, and their latest animation of SARS-CoV-2 entry into cells. Hosts: Vincent Racaniello, Rich Condit, Brianne Barker and Kathy Spindler Guest: Janet Iwasa Subscribe (free): iTunes, Google Podcas…
 
Eva Harris and Janet Smith join TWiV to discuss how an antibody against dengue virus NS1 protein blocks endothelial dysfunction and the potential of treating infections by multiple flaviviruses. Hosts: Vincent Racaniello, Alan Dove, Rich Condit, and Kathy Spindler Guest: Eva Harris and Janet Smith Subscribe (free): iTunes, Google Podcasts, RSS, ema…
 
In COVID-19 clinical update #51, Daniel Griffin reviews use of two masks, effectiveness of testing in nursing homes, updates on vaccines, use of nonsteroidal anti-inflammatory drugs, little effect of vitamin D and remdesivir in clinical studies, and a long COVID research initiative from NIH. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (f…
 
Ginger Campbell joins TWiV to discuss palliative care for COVID-19 patients, and how to approach the disease from a goals of care perspective. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, and Brianne Barker Guest: Ginger Campbell, MD Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode…
 
The entire TWiV team assembles to discuss resurgence of COVID-19 in Manaus, Brazil, discovery of SARS-CoV-2 related viruses in bats in Southeast Asia, and increased Ct values after administration of mRNA vaccine. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free): iTunes, Googl…
 
In COVID-19 clinical update #50, Daniel Griffin discusses CDC guidance on school opening, decreased viral load after vaccination, randomized clinical trial of vitamin D treatment, a study of zinc plus vitamin C, anticoagulation therapy effect on mortality, and multi system inflammatory phase in children. Hosts: Daniel Griffin and Vincent Racaniello…
 
Paul Offit joins TWiV to discuss all things vaccine, including how COVID-19 vaccine development was accelerated, whether the vaccines are safe and efficacious, the difference between an EUA and a licensed vaccine, sterilizing immunity, herd immunity, and much more. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and Brianne B…
 
In COVID-19 clinical update #49, Daniel Griffin discusses CDC guidelines on mask use, drop in test frequency in the US, resurgence of COVID-19 in Brazil, possible impact of Pfizer vaccine on viral load, EUA for bamlanivimab and etesevimab administered together, and preliminary results of Tocilizumab in hospitalized patients. Hosts: Daniel Griffin a…
 
TWiV explores single dose administration and timing of second dose of AZD1222 COVID-19 vaccine, safety and efficacy of Sputnik V, and control of coronavirus recombination by a viral proofreading exonuclease. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patr…
 
Theodora and Paul return to TWiV to explain how they quickly pivoted their retrovirus laboratories towards SARS-CoV-2, their work on the antibody response to infection and its durability, and the emergence of variants with increased resistance to neutralization. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, and Rich Condit Guests: Paul …
 
In COVID-19 clinical update #48, Daniel Griffin reviews effect of spike amino acid changes on neutralization with monoclonal antibodies, Sputnik V safety and efficacy results, increased reactogenicity after a single vaccine dose in seropositive individuals, single dose vaccination in seropositive health care workers, and results of three clinical t…
 
TWiV explains why hydroxychloroquine failed in humans despite showing antiviral effects in cells, and reviews the published data on the Pfizer/BioNTech mRNA vaccine. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode TMPRSS2…
 
Jason McLellan joins TWiV to reveal all we know about the SARS-CoV-2 spike protein, followed by Novavax and J&S phase 3 results and a discussion of variants of concern: neutralization by vaccine-induced antibodies, transmission, and virulence. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and Amy Rosenfeld Guest: Jason McLe…
 
In COVID-19 clinical update #47, Daniel Griffin reviews phase 3 results for Novavax and J&J vaccines, transmission in K-12 settings in Wisconsin, data on Lilly and Regeneron monoclonal antibody therapy, and a study of colchicine for treatment of disease. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTunes, Google Podcasts, RSS, em…
 
Gisa, Steffi, and César join TWiV to discuss their careers, their research, and the COVID-19 pandemic in Germany. Hosts: Vincent Racaniello, Rich Condit, and Kathy Spindler Guests: Gisa Gerold, Stefanie Becker, and César Muñoz-Fontela Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode German Societ…
 
The TWiVers review Biden’s national strategy for the COVID-19 responses and pandemic preparedness, and an evaluation of the BinaxNOW rapid antigen test for SARS-CoV-2 infection. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and Brianne Barker Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Lin…
 
In COVID-19 clinical update #46, Daniel Griffin discusses the BinaxNow rapid antigen test, efficacy of Bamlanivimab in nursing homes, associations of serum vitamin D concentrations with in-hospital mortality and need for invasive mechanical ventilation, trials of IL-6 receptor antagonists, effects of anticoagulants on in-hospital mortality, and sym…
 
In this episode, President Biden elevates his science advisor to his Cabinet, a review of the current flu season, the scientific goals of the WHO-convened Global Study of the Origins of SARS-CoV-2, and answers to listener questions. Hosts: Vincent Racaniello, Rich Condit, and Kathy Spindler Subscribe (free): iTunes, Google Podcasts, RSS, email Beco…
 
The TWiVy team deconstructs CoronaVac, the inactivated SARS-CoV-2 vaccine produced by Sinovac Biotech, and production of multivalent camelid nanobodies that block infection with the virus and suppress selection of neturalization-resistant variants. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and Brianne Barker Subscribe (…
 
In COVID-19 clinical update #45, Daniel Griffin discusses J&J Ad26 vaccine results, reactogenicity after the second dose of mRNA vaccines, expansion of vaccine eligibility, and the finding that encephalitis after SARS-CoV-2 infection is a cytokine release syndrome. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTunes, Google Podcas…
 
TWiV answers listener questions about pandemic response, excess deaths in 25-44 year olds, vaccines, vaccines, and vaccines. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode Poems are at Twiverse 2020 US traffic deaths (Ca…
 
Emily Travanty from the Colorado Department of Public Health and Environment joins TWiV to discuss how her laboratory was the first in the US to detect the SARS-CoV-2 variant VOC 202012/01. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, and Brianne Barker Guest: Emily Travanty Subscribe (free): iTunes, Google Podcasts, RSS, …
 
In this COVID-19 clinical update, Daniel Griffin summarizes current status of vaccination in the US, discusses a study on convalescent sera from Argentina, use of remdesivir in patients with kidney disease, and provides further considerations on the use of Ct values in patient management. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free…
 
On this episode, a discussion of why modifying the dose schedule of the mRNA vaccines in the US is not a good idea, evidence that lower Ct values on hospital admission is associated with higher mortality, and dose-dependent response to SARS-CoV-2 infection of ferrets. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Subscr…
 
For this first episode of 2021, the complete TWiV team reviews compelling virology stories of 2020, and thanks the multitude of guests who have helped us to navigate the pandemic, and our many listeners who turn to us for scientific facts. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, Rich Condit, Kathy Spindler, and Brianne Barker Subs…
 
In Daniel Griffin’s final clinical report for 2020, he summarizes what we have learned about the clinical management of COVID-19 patients in the past year. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode Attributes and predictors of long COVID-19 (med…
 
TWiV reviews additional data on the UK variant of SARS-CoV-2, the distinct variant spreading in South Africa, association of afucosylated antiviral IgG with severe COVID-19, approval of AstraZeneca vaccine in the UK, and winners of the pandemic poem contest. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Subscribe (free)…
 
From the 2020 online meeting of the American Society for Tropical Medicine and Hygiene, Vincent speaks with Jonathan Auguste, Carol Blair, Desiree LaBeaud, Louis Lambrechts, and Mauricio Nogueira about their careers and their research on arthropod-borne viruses. Host: Vincent Racaniello Guests: Jonathan Auguste, Carol Blair, Desiree LaBeaud, Louis …
 
Daniel Griffin provides his weekly clinical report on COVID-19, including his own experience with vaccination, guidelines for vaccine distribution, reasons for under-utilization of monoclonal antibody therapy, and much more. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! L…
 
TWiV reviews the latest data on the UK variant of SARS-CoV-2, including some properties of the variant and why it is being closely studied, development of liver cancer in a participant in a adenovirus-associated virus gene therapy trial, and answers to listener questions. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne Barker Su…
 
TWiV explains that COVID-19 is not harmless for young adults, FAA approval for Pfizer mRNA vaccine, lack of justification for the claim of reverse transcription of SARS-CoV-2 RNA and integration into the human genome, and lack of evidence for increased transmission by new variants in the UK. Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove,…
 
Daniel Griffin provides his weekly clinical report on COVID-19, including thoughts on the first immunizations with Pfizer mRNA vaccine, the anticipated EUA for the Moderna vaccine, whether the vaccine prevents infection, not just disease, monoclonal antibody therapy, and much more. Hosts: Daniel Griffin and Vincent Racaniello Subscribe (free): iTun…
 
On this episode, TWiV makes Bloomberg Business News 2020 Jealousy List, crushing of CDC revealed by insiders, seasonal influenza during the COVID-19 pandemic, FDA briefing documents from Moderna, and three-quarters attack rate of SARS-CoV-2 during an unmitigated epidemic in Brazil. Hosts: Vincent Racaniello, Rich Condit, Kathy Spindler, and Brianne…
 
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