Scientists who helped to fight the 2003 epidemic of SARS (severe acute respiratory syndrome) have sprung into action again to investigate the latest threat: a new SARS-related virus that has killed one man and left another seriously ill. Last week, the researchers reported the genome sequence of the new coronavirus and the first diagnostic tests to screen for it — two major advances that will help in efforts to control the pathogen if it turns into a wider menace.
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