Source: China – South China Morning PostChina has built a certain level of herd immunity against Covid-19 but will need to boost its power to fight variants, the country’s top respiratory expert said.Addressing a forum in the southern city of Guangzhou on Thursday, Zhong Nanshan said China had fully inoculated 1.21 billion people, or 86 per cent of its population, and given booster doses to nearly a quarter.“Theoretically speaking, China has met the standard of herd immunity, but it’s against the ‘wild type’ virus,” Zhong said,…Read More