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There is no vaccine against swine flu, but the CDC has taken the initial step necessary for producing one — creating a seed stock of the virus — should authorities decide that's necessary. Last winter's flu shot offers no cross-protection to the new virus, although it's possible that older people exposed to various Type A flu strains in the past may have some immunity, CDC officials said Sunday.
http://news.yahoo.com/s/ap/20090427/ap_ ... _swine_flu [/TD]