TWiV reviews measles outbreaks in England and Europe, 2 fatal Nipah virus cases in Bangladesh, yellow fever outbreak in Sudan, and discuss how the type of immunodeficiency influences the outcome of SARS-CoV-2 infection, and programming of alveolar macrophages by intestinal bacteria that influences severity of respiratory viral infection.

The TWiVians present an imported case of yellow fever in New York City, and explain how a dengue virus subgenomic RNA disrupts immunity in mosquito salivary glands to increase virus replication

Nischay and Ian join the TWiVions to discuss mass die-offs of tilapia by a novel orthomyxo-like virus, Ian’s editorial on the movie Vaxxed, and new vaccines to prevent dengue virus infections, including a human challenge model.

Vincent, Alan, Dickson and Rich answer listener questions about XMRV, yellow fever vaccine, virus-like particles, West Nile virus, amyotrophic lateral sclerosis and human endogenous retroviruses, multiplicity of infection, and how to make a poxvirus.