TWiV reviews a seminal paper showing that chemically modified bases in RNAs suppress recognition by Toll-like receptors, a finding that that was essential for the development of COVID-19 mRNA vaccines. Hosts: Vincent Racaniello, Dickson Despommier, Rich Condit, and Kathy Spindler Subscribe (free): Apple Podcasts, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode Vaccine Town Hall (ASV) Columbia University BSL-3 Manager position RNA modifications suppress innate recognition (Immunity) Critical contribution of pseudouridine (Front Cell Dev Biol) Rich Condit reminisces (YouTube) Letters read on TWiV 860 Timestamps by Jolene. Thanks! Weekly Picks Dickson - NASA Research Launches a New Generation of Indoor Farming Kathy -How Pfizer scientists transformed an old drug lead into a COVID-19 antiviral Rich - Fermi paradox Vincent - Racism not Race by Joe Graves Listener Picks Jay – Restoration of Ave Maria John – Pandemic humor Intro music is by Ronald Jenkees Send your virology questions and comments to [email protected]