Shanghai introduces zones to ease restrictions
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Hu Bijie, who is on the expert team for COVID-19 medical treatment in Shanghai, said there was no evidence recovered patients were spreading the virus.
"Even though there are reports at home and abroad that recovered COVID-19 individuals showed varying degrees of testing positive again, we have found that they haven't caused infections in the surrounding population," said Hu, who is also director of the department of infectious diseases at Shanghai Zhongshan Hospital.