IT Losing Ground in Virus Battle:
"After years of success deploying more effective and smarter defenses, anti-virus researchers contacted last week in the wake of the MyDoom outbreak acknowledged for one of the first times that the battle may be getting away from them.

The MyDoom virus, which hit Jan. 26 and infected several-hundred-thousand machines, is the fastest-spreading virus in the history of the Internet, experts said. At its peak late last week, MyDoom had infected one in every 12 pieces of e-mail, according to MessageLabs Inc., a New York-based e-mail security company. MyDoom also is the latest in a line of recent viruses that, while not particularly innovative, have been maddeningly effective.…"

http://www.eweek.com/print_article/0,3048,a=117996,00.asp