Why Viruses are Hard to Kill

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PHOTOS & GRAPHICS
On Assignment: The SARS Outbreak


Fighting SARS, By the Numbers


How the Virus Spreads


How a Coronavirus Works


Dr. Julie Gerberding, director of the U.S. Centers for Disease Control and Prevention, was elated. In a matter of weeksnot months or yearsteams of scientists whose work was coordinated by the World Health Organization had managed to decode the entire genetic sequence of the new coronavirus now conclusively believed to cause SARS, or severe acute respiratory syndrome. "It's a scientific achievement that I don't think has ever been paralleled in human history," said Dr. Gerberding shortly before the April 16 announcement that the coronavirus's genetic fingerprint had been fully...

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