According to a Symantec report at the end of 2006, Beijing is now home to the world's largest collection of malware-infected computers, nearly 5% of the world's total. Research by the security company Sophos in April showed that China has overtaken the U.S. in hosting Web pages that secretly install malicious programs on computers to steal private information or send spam e-mails. And another report from Sophos earlier that month showed that Europe produces more spam than any other continent; one Polish Internet service provider alone produces fully 5% of the world's spam.

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