A new variant of the Nimda worm has appeared on the Internet, although exactly how it is different or whether it will be more or less serious than the original worm is so far undetermined, anti-virus firms said Tuesday. Nonetheless, users are cautioned to patch their systems as soon as possible to prevent infection. http://www.cnn.com/2001/TECH/internet/10/31/new.nimda.idg/index.html

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