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Vaccination is priority to protect public health, says expert
01:16

Wu Zhiwei, professor at Nanjing University's Medical School, says vaccination is the priority to protect public health, as the Chinese mainland reports 157 new COVID-19 cases. Among the 97 locally transmitted cases, the central province of Henan remains the hardest hit with 60 cases, two of them identified as the Omicron variant. 

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