We're Number 1Sophos, the world leader in integrated threat management solutions compiled a report with results that the United States was responsible for over one third of the malicious code in websites during 2006. The Sophos Security Report examined in detail the top 10 Malware threats of 2006.
Malware Statistics
Malware Statistics

The U.S also leads the world in spam relaying. Although, legislation has been passed to deter spam, there is still more spam being sent from the U.S.
Spam Statistics
Spam Statistics
Sophos also notes that 90% of all spam on the Internet is relayed via zombie computers, hijacked by Trojan horses, viruses and worms.
Source:sophos.com

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