Coronavirus: China’s cities are in a race for herd immunity – but what does that mean?

Several cities with advanced vaccination programmes are vying to become the first in China to reach herd immunity.But questions remain about when exactly that tipping point – at which a population is largely protected from Covid-19 even though not everyone is immune – occurs. Experts say it cannot be calculated in a formula but rather must withstand the reality test.The World Health Organization, which supports achieving herd immunity through vaccination rather than by allowing the disease to…

Read the original article at South China Morning Post