Vincent, Rich, and Brianne discuss a study estimating the fraction of symptoms and severe disease after SARS- CoV-2 infection, cellular immune responses without seroconversion during interfamilial infections, and answer listener email.

From the Environmental Health Institute in Singapore, Vincent speaks with Director Lee Ching Ng about their work to control viral infectious diseases, including the controlled release of mosquitoes containing Wolbachia endosymbionts to inhibit viral transmission.

Daniel Griffin provides a clinical update on COVID-19, including analysis of the dexamethasone trial, and then we discuss two Ebolavirus outbreaks in DRC, clinical and virological aspects of asymptomatic SARS-CoV-2 infections, age-dependent effects on transmission, and answer listener email.

Vincent and Rich discuss the SARS-CoV-2 D614G amino acid change in the spike glyprotein, duration of infectious virus shedding from patients, virus transmission among hamsters infected in the laboratory, and tackle listener email.

Daniel Griffin provides a clinical update on COVID-19, then Ralph Baric joins TWiV to discuss SARS-CoV-2 transmission, vaccines, diagnostic tests, and a new animal model from his laboratory that does not use transgenic mice.

Vincent and Rich visit Fred Murphy to hear about his wide-ranging career in virology, spanning many institutions, involving dangerous viruses like rabies virus, Ebolavirus (he took that famous iconic image), Marburg virus, Lassa virus, coronaviruses, and later writing a history of the field.

Peter Daszak joins TWiV to explain the work of EcoHealth Alliance in surveillance of bats in China for SARS-related coronaviruses to provide the information needed to prevent future pandemics, and why NIH recently withdrew financial support for their work.