There was good reason for Dr. Ai’s concern. Severe acute respiratory syndrome, or SARS, a coronavirus that erupted in China in November 2002, had thrown the country into its worst political crisis since the 1989 Tiananmen Square uprising. The initial response of the Chinese government and the ruling Communist Party had been to hide the outbreak, even from its own public health officers. Under the cloak of the news blackout, SARS spread through the country, reaching Beijing the following March. Doctors in charge of the treatment had no idea what was going on, so closely held was the
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