Vincent, Dickson, Alan and Rich discuss an estimate of the number of different mammalian viruses on Earth.
Matt joins Vincent, Alan, and Rich to summarize what we know and what we do not know about the MERS coronavirus.
Vincent, Alan, Dickson and Welkin review how a virus regulates the severity of mucocutaneous leishmaniasis, virophage control of antarctic algal host-virus dynamics, and human metapneumovirus infection in gorillas.