In the early afternoon of 3 January this year, a small metal box was delivered to the Shanghai Public Health Clinical Centre addressed to virus expert Prof Zhang Yongzhen. Inside, packed in dry ice, were swabs from a patient who was suffering from a novel, occasionally fatal respiratory illness that was sweeping the city of Wuhan. Exactly what was causing terrifying rises in case numbers, medical authorities wanted to know? And how was the disease being spread?
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What Zhang did was critical … Without the information he provided no one could have started working on vaccines
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