![Countries join battle against swine flu](../../images/attachement/jpg/site1/20090429/00221917f7600b61e08b1a.jpg)
This preliminary negative stained transmission electron micrograph (TEM) depicts some of the ultrastructural morphology of an H1N1 "swine flu" virus culture obtained from a California patient suffering from the current international flu outbreak, in an image obtained from the US Centers for Disease Control (CDC) in Atlanta April 28, 2009.[Agencies]
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