When Dr Raymond Liu Wai-to received five Covid-19 patients from the same family one night in February, he feared what might come next.“I thought Hong Kong could be on the cusp of a large community outbreak, which would overwhelm the public health care system and have disastrous consequences,” said the infectious disease specialist and chief of Ruttonjee Hospital’s isolation ward.His anxiety deepened when the father in the family of patients became so ill he was coughing blood. This was even…
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