Computer security experts believe the virus will be under control by Monday, but ILOVEYOU has already caused more damage than last year's Melissa virus, which spurred many companies to invest in costly and complex computer security measures.

CNN: 'Melissa' May Have Built a False Sense of Security

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CNN: Inside the Envelope

The current U.S. pandemic control strategy is based on computer simulations that assume a flu virus with an R-naught between 1.6 and 2.4.

CNN: Scientists dig for lessons from past pandemics