Hong Kong fourth wave: city shifts testing of sewage samples to coronavirus-hit Yau Tsim Mong district

Hong Kong / Health & Environment Hong Kong fourth wave: city expecting 70-plus new Covid-19 cases, as sewage testing shifts to virus-hit Yau Tsim Mong district Pilot scheme, which previously led to mandatory testing in the city's Choi Hung Estate, examines waste for traces of Covid-19 HKU Professor Yuen Kwok-yung, meanwhile, will probe false negative results involving a family living in Yau Tsim Mong