The virus Hepatitis B infects liver cells, leading to either acute or chronic liver disease. Immune responses involve both curing and killing of cells. Stability analyses show that viral clearance depends only on the strength of the combined killing and curing, independent of the characteristics...

Compensatory mutations are evolutionary responses of influenza viruses resulting in the generation of escape mutants from immune recognition or in the emergence of highly transmissible drug resistant viruses. Model simulations show that: (i) resistance is unlikely to develop without compensation...

The coexistence of different viral strains (quasispecies) within the same host are nowadays observed for a growing number of viruses, most notably HIV, Marburg and Ebola, but the conditions for the formation and survival of new strains have not yet been understood. We present a model of HIV...