Klez.H becomes the biggest virus

Monday, 27 May 2002, 7:12 PM EST

The computer virus Klez.H has become the biggest of all time, surpassing SirCam, according to an e-mail security company.

Klez.H, which was first detected on April 15, now affects one in every 300 e-mails, said UK-based MessageLabs on Monday. The company has traced 775,000 copies of the virus so far.

SirCam broke out last summer and maintained an unprecedented growth rate as it replicated itself. That trend has been mirrored by Klez.H, which covers its tracks and deceives recipients, said Alex Shipp from MessageLabs.

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