Vincent travels to Qu├ębec City, Canada and the 11th Aquatic Virus Workshop, where he speaks with Fred Aylward and Jed Furman about the research of their laboratories on the ecology and evolution of aquatic viruses and their microbial communities.

The TWiVniks discuss the structure of a virus that reproduces in an extreme environment, long-term consequences of Ebolavirus infection, and VirScan, a method to identify the different virus infections you have had in your lifetime.

This week the TWiV team explains CRISPR/Cas, the immune system of bacteria and archaea, how novel viruses are discovered by deep sequencing of small RNAs, and the relationship between dry weather and outbreaks of West Nile virus infection.