Preface; Guenther Witzany.-

1. 
   

   Revolutionary struggle for existence: introduction to four intriguing puzzles in virus research; Matti Jalasvuori.-

   
   


2. 
   

   Quasispecies dynamics of RNA viruses; Miguel Angel Martínez et al.-

   
   


3. 
   

   The origin of virions and virocells: the escape hypothesis revisited; Patrick Forterre, Mart Krupovic.-

   
   


4. 
   

   Scratching the Surface of Biology's Dark Matter; Merry Youle et al.-

   
   


5. 
   

   Virus universe: can it be constructed from a limited number of viral architectures; Hanna M. Oksanen et al.-

   
   


6. 
   

   The addiction module as a social force; Luis Villarreal.-

   
   


7. 
   

   Viral integration and consequences on host gene expression; Sébastien Desfarges, Angela Ciuffi.-

   
   


8. 
   

   Persistent plant viruses: molecular hitchhikers or epigenetic elements?; Marilyn Roossinck.-

   
   


9. 
   

   The concept of virus in the post-Megavirus era; Jean Michel Claverie, Chantal Abergel.-

   
   


10. 
    

    Unpacking the baggage : Origin and Evolution of Giant Viruses; Jonathan Filee, Michael Chandler.-

    
    


11. 
    

    Megavirales composing a fourth domain of life: Mimiviridae and Marseilleviridae; Philippe Colson, Didier Raoult.-

    
    


12. 
    

    On viruses, bats and men: a natural history of food-borne viral infections; Harald Brussow.-

    
    


13. 
    

    LTR retroelement-derived protein-coding genes and vertebrate evolution; Domitille Chalopin et al.-

    
    


14. 
    

    Koala retrovirus endogenisation in action; Rachael Tarlington.-

    
    


15. 
    

    The evolutionary interplay between exogenous and endogenous sheep betaretroviruses; Alessia Armezzani et al.-

    
    


16. 
    

    Endogenous retroviruses and the epigenome ; Andrew B. Conley, I.King Jordan.-

    
    


17. 
    

    From viruses to genes: syncytins; Philippe Pérot et al.-

    
    


18. 
    

    Hepatitis G Virus or GBV-C: A Natural Anti-HIV Interfering Virus; Omar Bagasra et al.-

    
    


19. 
    

    Salutary Contributions of Viruses to Medicine and Public Health; Steve Abedon.-

    
    


20. 
    

    From Molecular Entities to Competent Agents: Viral Infection-Derived Consortia Act as Natural Genetic Engineers; Guenther Witzany.