TWiV explains the recent meeting of the National Science Advisory Board for Biosecurity (NSABB) where stricter guidelines for research involving human, animal, and plant pathogens were considered, and how the consumption of viruses by small protists returns energy to food chains.

Vincent visits the University of Michigan where he and Kathy speak with Michael, Adam, and Akira about polyomaviruses, virus evolution, and virus assembly, on the occasion of naming the department of Microbiology & Immunology a Milestones in Microbiology site.