<unk> , also known as superinfection resistance, is the inhibition of viral reproduction caused by previous exposure of cells to another virus. The exact mechanism for<unk>  is unknown. Factors that have been implicated are the generation of interferons by infected cells, and the occupation or down-modulation of cellular receptors. __TOC__
Viral interference
Microbial synergy
Virus inactivation
Viral pathogenesis
Cell death
Cell damage
Host adaptation
Antigenic variation