BACTERIOPHAGE AS A MODEL OF HOST- VIRUS RELATIONSHIP 201 



7. The virus in general is a concept, that is to say, an idea of a class of 

 objects. Because viruses differ from all other categories of entities, we have 

 the right to admit that the category "viruses" has an individuality and 

 perhaps a reality. 



8. Viruses are neither organisms nor cellular organelles. Viruses are viruses. 



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