Source: China – South China Morning PostChina has exported nearly 1 billion doses of Covid-19 vaccines to over 60 countries and pledged 2 billion doses this year, but just how effective the Chinese jabs are, especially against more transmissible or resistant variants, was initially unclear.The knowledge gap has been partially filled with publication of some large real-world effectiveness studies in countries where the Delta and Gamma variants have been prevalent.Researchers concluded that the Chinese vaccines were less effective than…Read More