British broadcasting corporation


PORTER And that increases the odds of mutation occurring? RUSSELL



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PORTER

And that increases the odds of mutation occurring?


RUSSELL

Well if you - if you only have influenza viruses circulating three months out of the year or four months out of the year, like we have here in England, for example, and we contrast that with a region of the world where viruses are always circulating, then you have a lot more opportunity for mutation.


PORTER

So is it unusual for this new strain, that's been in the headlines over the last couple of days, to have emerged outside of the East in Mexico?


RUSSELL

Well the patterns that lead to the emergence of these sorts of viruses, like the swine flu virus that's being observed in Mexico right now, are not well understood at all, so it's perfectly possible that this virus could have emerged in Asia but there's no reason that it couldn't have emerged in Mexico or anywhere else for that matter.



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transcripts -> This transcript is issued on the understanding that it is taken from a live programme as it was broadcast. The nature of live broadcasting means that neither the bbc nor the participants in the programme can guarantee the accuracy of the information
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