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Ron Fouchier explains why increased transmission of SARS-CoV-2-variants has not been demonstrated, and their ability to displace ancestral variants is due to greater fitness, much like influenza virus antigenic variation leads to better fitness and replacement of previously circulating variants. Hosts: Vincent Racaniello, Kathy Spindler, and Brianne Barker Guest: Ron Fouchier Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Links for this episode Weekly Picks Brianne – The Science News Cycle Kathy – mRNA Day Kariko & Weissman lectures and Q&A Vincent – Just Planes Intro music is by Ronald Jenkees Send your virology questions and comments to twiv@microbe.tv |