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Following the spread of Severe Acute Respiratory Syndrome (Sars) in forensic detail: from Guangdong province in China where it first went unidentified, confused with seasonal influenza. By March 2003, this a-typical pneumonia that didn't respond antibiotics had travelled to Hong Kong in the lungs of a 64-year-old doctor, who infected fellow international hotel guests. And it had acquired a name, Sars – but not a cure.