Vincent, Alan, Rich and Eric discuss identification of viruses in Northeastern American bats, vaccinia virus infection after sexual contact with a military vaccinee, and identification of a new flavivirus from an Old World bat in Bangladesh.

Vincent, Alan, and Rich are enthralled by movies of vaccinia virus plaque formation, then consider how repulsion of superinfection virions leads to rapid virus spread, and a therapeutic prostate cancer vaccine.

Vincent, Dick, Alan and Rich revisit a vaccinia virus lab accident and viral vaccines produced in plants, then talk about an iPhone app to track infectious diseases, flying foxes, and an inhaled measles vaccine.

Vincent and Dick discuss influenza virus-like particle vaccines produced in insect and plant cells, rapid sharing of influenza research, and answer listener questions about cytomegalovirus, viral evolution and symbiosis and much more.

Vincent, Alan, and Stephen Morse discuss progressive vaccinia in a smallpox vaccinee, arsenic and influenza in mice, facemasks and flu transmission, and antigenic and genetic analyses of the new H1N1 influenza virus.

Vincent and Chris Upton converse about hepatitis B in India, AIDS gene therapy with a ribozyme, antibodies that neutralize many influenza virus strains, killing tumors with vaccinia virus, myxoma virus of rabbits, and the Viral Bioinformatics Resource Center.