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Message: <blockquote data-quote="hafizsaad" data-source="post: 5754949" data-attributes="member: 153303">this picturing is the description about Antigenic shift is the process by which at least two different strains of a virus (or different viruses), especially influenza, combine to form a new subtype having a mixture of the surface antigens of the two original strains. The term antigenic shift is more often applied specifically (but is not limited) to the influenza literature, as it is the best known example (e.g. visna virus in sheep)[1]. Antigenic shift is a specific case of reassortment or viral shift that confers a phenotypic change.see more detail<a href="http://en.wikipedia.org/wiki/Antigenic_shift" target="_blank">http://en.wikipedia.org/wiki/Antigenic_shift</a></blockquote>

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