Code Red claimed two major victims this week, as Microsoft confirmed that some servers running its MSN Hotmail service were infected with a version of the worm and express-shipping giant Federal Express said the worm interfered with some deliveries Wednesday.

Microsoft spokesman Jim Desler said Thursday that some Hotmail servers were brought offline to deal with the problem and that service was not disrupted. About 110 million people have accounts with the free Web-based e-mail service, according to Microsoft.

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