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    new flu viruses

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    A brief explanation occurs for this question:

    Every year new flu viruses arise in the world, and yet most of the time we have one or more lymphocytes that can respond to these new viruses. How is this so?

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    Solution Preview

    If our body encounter the same flu virus which one has encountered earlier, the memory cell is capable of producing defense mechanism on immediate basis. ...

    Solution Summary

    New flu viruses are asssessed.