The vaccine miracle: how scientists waged the battle against Covid-19 – The Guardian

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?
Zhang and his colleagues set to work….

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