DELTA SURGE A medical worker takes swab samples from a child during mass testing for Covid-19 at a residential block in Wuhan in central China’s Hubei Province on Aug. 3, 2021. China suspended flights and trains, canceled professional basketball league games and announced mass coronavirus testing in Wuhan on Tuesday as widening outbreaks of the Delta variant reached the city where the disease was first detected in late 2019. AP PHOTO
DELTA SURGE A medical worker takes swab samples from a child during mass testing for Covid-19 at a residential block in Wuhan in central China’s Hubei Province on Aug. 3, 2021. China suspended flights and trains, canceled professional basketball league games and announced mass coronavirus testing in Wuhan on Tuesday as widening outbreaks of the Delta variant reached the city where the disease was first detected in late 2019. AP PHOTO


BEIJING: China's top epidemiologist Zhong Nanshan said China needs to vaccinate about 83 percent of its population to achieve herd immunity.

He also revealed that all the 13 severe cases infected with the Delta variant in Guangzhou Covid-19 outbreak in May did not get inoculated. Zhong made the remarks during a speech in Guangzhou, South China's Guangdong Province, on Saturday.

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