Source: China – South China Morning PostChina has administered 2.2 billion doses of Covid-19 vaccines and fully vaccinated 72 per cent of the population, but there is still no sign of relaxing what are arguably the world’s toughest containment rules, including long quarantine periods and strict border controls.The zero tolerance policy has largely contained the community spread of Covid-19 but it has also prevented assessment at home of how vaccination would affect the epidemic or how long vaccine immunity could protect the…Read More