TWiV reviews influenza H5N1 in North American cows and in birds throughout New York City, polio health emergency extended, ChatGPT to control vaccine hesitancy, increasing viral hepatitis worldwide, dengue public health alert in Puerto Rico, cherry trees drowning in Washington DC, death of iron lung Paul, origin and dispersal history of hepatitis B virus in Eastern Eurasia, and antibody-independent protection against heterologous SARS-CoV-2 challenge.

TWiV discusses genetic evidence of susceptible wildlife in SARS-CoV-2 positive samples at the Huanan Wholesale Seafood Market, polio cases in African linked to a new polio vaccine that was designed to not cause the disease, and structural conservation of hepatitis B virus capsid proteins over millions of years despite a shift from a naked to an enveloped capsid.

The meteorologicomaniacs discuss the COVID-19 pandemic global death toll, effectiveness of vaccines against the delta variant, and how analysis of ancient viral DNA reveals that two pathogenic human viruses were brought into Mexico during the transatlantic slave trade.

From the Karolinska Institute in Stockholm, Vincent speaks with Niklas Björkström, Ali Mirazimi, and Matti Sällberg about their work on the impact of chronic hepatitis C virus infection on NK cells, Crimean-Congo hemorrhagic fever virus vaccines, and immunotherapy to block entry of hepatitis B and D viruses.

Nels joins the TWiV team to talk about his work on genomic accordions in vaccinia virus, hepatitis B virus in a 439 year old mummy, and viral induction of energy synthesis by a long noncoding RNA.

From Indiana University, Vincent and Kathy speak with Tuli Mukhopadhyay, John Patton, and Adam Zlotnick about their careers and their work on alphaviruses, hepatitis B virus, and rotaviruses.