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China has confirmed a new case of severe acute respiratory syndrome (SARS). It is the country's first new case since the outbreak last year, which came under control in July only after it infected more than 8000 people and caused 774 deaths in 27 countries. This is the first case that cannot be linked to a source. Two isolated cases—in Singapore in September and Taipei in December last year—were caused by contamination in a laboratory. The latest patient, a 32 year old journalist from Panyu, near the Guangdong provincial capital of Guangzhou, became ill on 16 December, developed …
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J. Parry (2004) studied this question.
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