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Chris, I took a look at the URL you cited and I although it's informative, I don't see that it addresses the issue. Can you explain further? I understand that flu is a viral disease.... but can't viruses mutate and become stronger? Thank you for your help. Dan "Christian Rüger" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > Because influenza is a viral disease. > > http://www.cdc.gov/ncidod/diseases/flu/vacfacts.htm
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