Viral Pathogenesis iral pathogenesis can be divided into several stages aspects Transmission and entry of the virus into the host Spread in the host (systemic or localized infections) Tropism Virulence Patterns of viral infection and disease Host factors host defenseViral Pathogenesis z Viral pathogenesis can be divided into several stages & aspects ¾ Transmission and entry of the virus into the host ¾ Sp (y ) read in the host (systemic or localized infections) ¾ Tropism ¾ Virulence ¾ Patterns of viral infection and disease ¾ Host factors & host defense