BBCNEWS BBC News December 31, 2021 16:14:00
Sun chunlan told officials there to speed up testing and do more to isolate the close contacts of those found to be positive. more than 1,200 cases have been found in the city in the past few weeks. dr xi chen from yale university is an expert on health policy and explained why china is continuing to pursue a strategic of �*zero covid'. china has been maintaining a zero tolerance policy for a long time, almost two years, so it is ramping up mass testing, quarantine, and the strict border controls, and although the case numbers are low, china has been worried about once it is opening up it wi...