SARS Linked to New Variation of Common-Cold Virus

Scientists in Hong Kong studying severe acute respiratory syndrome say the flu-like illness may be caused by a previously unknown form of the coronavirus, which also causes the common cold. In a study published in Lancet, researchers say 45 out of 50 people with SARS, which has killed more than 100 people worldwide, have the virus in their blood. Hear NPR's John McChesney.

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